drivers/video/fbdev/sis/sis_accel.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * SiS 300/540/630[S]/730[S],
   4  * SiS 315[E|PRO]/550/[M]650/651/[M]661[F|M]X/740/[M]741[GX]/330/[M]760[GX],
   5  * XGI V3XT/V5/V8, Z7
   6  * frame buffer driver for Linux kernels >= 2.4.14 and >=2.6.3
   7  *
   8  * 2D acceleration part
   9  *
  10  * Based on the XFree86/X.org driver which is
  11  *     Copyright (C) 2001-2005 by Thomas Winischhofer, Vienna, Austria
  12  *
  13  * Author: Thomas Winischhofer <thomas@winischhofer.net>
  14  *                      (see http://www.winischhofer.net/
  15  *                      for more information and updates)
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/fb.h>
  21 #include <linux/ioport.h>
  22 #include <linux/types.h>
  23 #include <asm/io.h>
  24
  25 #include "sis.h"
  26 #include "sis_accel.h"
  27
  28 static const u8 sisALUConv[] =
  29 {
  30     0x00,       /* dest = 0;            0,      GXclear,        0 */
  31     0x88,       /* dest &= src;         DSa,    GXand,          0x1 */
  32     0x44,       /* dest = src & ~dest;  SDna,   GXandReverse,   0x2 */
  33     0xCC,       /* dest = src;          S,      GXcopy,         0x3 */
  34     0x22,       /* dest &= ~src;        DSna,   GXandInverted,  0x4 */
  35     0xAA,       /* dest = dest;         D,      GXnoop,         0x5 */
  36     0x66,       /* dest = ^src;         DSx,    GXxor,          0x6 */
  37     0xEE,       /* dest |= src;         DSo,    GXor,           0x7 */
  38     0x11,       /* dest = ~src & ~dest; DSon,   GXnor,          0x8 */
  39     0x99,       /* dest ^= ~src ;       DSxn,   GXequiv,        0x9 */
  40     0x55,       /* dest = ~dest;        Dn,     GXInvert,       0xA */
  41     0xDD,       /* dest = src|~dest ;   SDno,   GXorReverse,    0xB */
  42     0x33,       /* dest = ~src;         Sn,     GXcopyInverted, 0xC */
  43     0xBB,       /* dest |= ~src;        DSno,   GXorInverted,   0xD */
  44     0x77,       /* dest = ~src|~dest;   DSan,   GXnand,         0xE */
  45     0xFF,       /* dest = 0xFF;         1,      GXset,          0xF */
  46 };
  47 /* same ROP but with Pattern as Source */
  48 static const u8 sisPatALUConv[] =
  49 {
  50     0x00,       /* dest = 0;            0,      GXclear,        0 */
  51     0xA0,       /* dest &= src;         DPa,    GXand,          0x1 */
  52     0x50,       /* dest = src & ~dest;  PDna,   GXandReverse,   0x2 */
  53     0xF0,       /* dest = src;          P,      GXcopy,         0x3 */
  54     0x0A,       /* dest &= ~src;        DPna,   GXandInverted,  0x4 */
  55     0xAA,       /* dest = dest;         D,      GXnoop,         0x5 */
  56     0x5A,       /* dest = ^src;         DPx,    GXxor,          0x6 */
  57     0xFA,       /* dest |= src;         DPo,    GXor,           0x7 */
  58     0x05,       /* dest = ~src & ~dest; DPon,   GXnor,          0x8 */
  59     0xA5,       /* dest ^= ~src ;       DPxn,   GXequiv,        0x9 */
  60     0x55,       /* dest = ~dest;        Dn,     GXInvert,       0xA */
  61     0xF5,       /* dest = src|~dest ;   PDno,   GXorReverse,    0xB */
  62     0x0F,       /* dest = ~src;         Pn,     GXcopyInverted, 0xC */
  63     0xAF,       /* dest |= ~src;        DPno,   GXorInverted,   0xD */
  64     0x5F,       /* dest = ~src|~dest;   DPan,   GXnand,         0xE */
  65     0xFF,       /* dest = 0xFF;         1,      GXset,          0xF */
  66 };
  67
  68 static const int myrops[] = {
  69         3, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
  70 };
  71
  72 /* 300 series ----------------------------------------------------- */
  73 #ifdef CONFIG_FB_SIS_300
  74 static void
  75 SiS300Sync(struct sis_video_info *ivideo)
  76 {
  77         SiS300Idle
  78 }
  79
  80 static void
  81 SiS300SetupForScreenToScreenCopy(struct sis_video_info *ivideo, int xdir, int ydir,
  82                                  int rop, int trans_color)
  83 {
  84         SiS300SetupDSTColorDepth(ivideo->DstColor);
  85         SiS300SetupSRCPitch(ivideo->video_linelength)
  86         SiS300SetupDSTRect(ivideo->video_linelength, 0xffff)
  87
  88         if(trans_color != -1) {
  89                 SiS300SetupROP(0x0A)
  90                 SiS300SetupSRCTrans(trans_color)
  91                 SiS300SetupCMDFlag(TRANSPARENT_BITBLT)
  92         } else {
  93                 SiS300SetupROP(sisALUConv[rop])
  94         }
  95         if(xdir > 0) {
  96                 SiS300SetupCMDFlag(X_INC)
  97         }
  98         if(ydir > 0) {
  99                 SiS300SetupCMDFlag(Y_INC)
 100         }
 101 }
 102
 103 static void
 104 SiS300SubsequentScreenToScreenCopy(struct sis_video_info *ivideo, int src_x,
 105                                    int src_y, int dst_x, int dst_y, int width, int height)
 106 {
 107         u32 srcbase = 0, dstbase = 0;
 108
 109         if(src_y >= 2048) {
 110                 srcbase = ivideo->video_linelength * src_y;
 111                 src_y = 0;
 112         }
 113         if(dst_y >= 2048) {
 114                 dstbase = ivideo->video_linelength * dst_y;
 115                 dst_y = 0;
 116         }
 117
 118         SiS300SetupSRCBase(srcbase);
 119         SiS300SetupDSTBase(dstbase);
 120
 121         if(!(ivideo->CommandReg & X_INC))  {
 122                 src_x += width-1;
 123                 dst_x += width-1;
 124         }
 125         if(!(ivideo->CommandReg & Y_INC))  {
 126                 src_y += height-1;
 127                 dst_y += height-1;
 128         }
 129         SiS300SetupRect(width, height)
 130         SiS300SetupSRCXY(src_x, src_y)
 131         SiS300SetupDSTXY(dst_x, dst_y)
 132         SiS300DoCMD
 133 }
 134
 135 static void
 136 SiS300SetupForSolidFill(struct sis_video_info *ivideo, u32 color, int rop)
 137 {
 138         SiS300SetupPATFG(color)
 139         SiS300SetupDSTRect(ivideo->video_linelength, 0xffff)
 140         SiS300SetupDSTColorDepth(ivideo->DstColor);
 141         SiS300SetupROP(sisPatALUConv[rop])
 142         SiS300SetupCMDFlag(PATFG)
 143 }
 144
 145 static void
 146 SiS300SubsequentSolidFillRect(struct sis_video_info *ivideo, int x, int y, int w, int h)
 147 {
 148         u32 dstbase = 0;
 149
 150         if(y >= 2048) {
 151                 dstbase = ivideo->video_linelength * y;
 152                 y = 0;
 153         }
 154         SiS300SetupDSTBase(dstbase)
 155         SiS300SetupDSTXY(x,y)
 156         SiS300SetupRect(w,h)
 157         SiS300SetupCMDFlag(X_INC | Y_INC | BITBLT)
 158         SiS300DoCMD
 159 }
 160 #endif
 161
 162 /* 315/330/340 series ---------------------------------------------- */
 163
 164 #ifdef CONFIG_FB_SIS_315
 165 static void
 166 SiS310Sync(struct sis_video_info *ivideo)
 167 {
 168         SiS310Idle
 169 }
 170
 171 static void
 172 SiS310SetupForScreenToScreenCopy(struct sis_video_info *ivideo, int rop, int trans_color)
 173 {
 174         SiS310SetupDSTColorDepth(ivideo->DstColor);
 175         SiS310SetupSRCPitch(ivideo->video_linelength)
 176         SiS310SetupDSTRect(ivideo->video_linelength, 0x0fff)
 177         if(trans_color != -1) {
 178                 SiS310SetupROP(0x0A)
 179                 SiS310SetupSRCTrans(trans_color)
 180                 SiS310SetupCMDFlag(TRANSPARENT_BITBLT)
 181         } else {
 182                 SiS310SetupROP(sisALUConv[rop])
 183                 /* Set command - not needed, both 0 */
 184                 /* SiSSetupCMDFlag(BITBLT | SRCVIDEO) */
 185         }
 186         SiS310SetupCMDFlag(ivideo->SiS310_AccelDepth)
 187         /* The chip is smart enough to know the direction */
 188 }
 189
 190 static void
 191 SiS310SubsequentScreenToScreenCopy(struct sis_video_info *ivideo, int src_x, int src_y,
 192                          int dst_x, int dst_y, int width, int height)
 193 {
 194         u32 srcbase = 0, dstbase = 0;
 195         int mymin = min(src_y, dst_y);
 196         int mymax = max(src_y, dst_y);
 197
 198         /* Although the chip knows the direction to use
 199          * if the source and destination areas overlap,
 200          * that logic fails if we fiddle with the bitmap
 201          * addresses. Therefore, we check if the source
 202          * and destination blitting areas overlap and
 203          * adapt the bitmap addresses synchronously
 204          * if the coordinates exceed the valid range.
 205          * The the areas do not overlap, we do our
 206          * normal check.
 207          */
 208         if((mymax - mymin) < height) {
 209                 if((src_y >= 2048) || (dst_y >= 2048)) {
 210                         srcbase = ivideo->video_linelength * mymin;
 211                         dstbase = ivideo->video_linelength * mymin;
 212                         src_y -= mymin;
 213                         dst_y -= mymin;
 214                 }
 215         } else {
 216                 if(src_y >= 2048) {
 217                         srcbase = ivideo->video_linelength * src_y;
 218                         src_y = 0;
 219                 }
 220                 if(dst_y >= 2048) {
 221                         dstbase = ivideo->video_linelength * dst_y;
 222                         dst_y = 0;
 223                 }
 224         }
 225
 226         srcbase += ivideo->video_offset;
 227         dstbase += ivideo->video_offset;
 228
 229         SiS310SetupSRCBase(srcbase);
 230         SiS310SetupDSTBase(dstbase);
 231         SiS310SetupRect(width, height)
 232         SiS310SetupSRCXY(src_x, src_y)
 233         SiS310SetupDSTXY(dst_x, dst_y)
 234         SiS310DoCMD
 235 }
 236
 237 static void
 238 SiS310SetupForSolidFill(struct sis_video_info *ivideo, u32 color, int rop)
 239 {
 240         SiS310SetupPATFG(color)
 241         SiS310SetupDSTRect(ivideo->video_linelength, 0x0fff)
 242         SiS310SetupDSTColorDepth(ivideo->DstColor);
 243         SiS310SetupROP(sisPatALUConv[rop])
 244         SiS310SetupCMDFlag(PATFG | ivideo->SiS310_AccelDepth)
 245 }
 246
 247 static void
 248 SiS310SubsequentSolidFillRect(struct sis_video_info *ivideo, int x, int y, int w, int h)
 249 {
 250         u32 dstbase = 0;
 251
 252         if(y >= 2048) {
 253                 dstbase = ivideo->video_linelength * y;
 254                 y = 0;
 255         }
 256         dstbase += ivideo->video_offset;
 257         SiS310SetupDSTBase(dstbase)
 258         SiS310SetupDSTXY(x,y)
 259         SiS310SetupRect(w,h)
 260         SiS310SetupCMDFlag(BITBLT)
 261         SiS310DoCMD
 262 }
 263 #endif
 264
 265 /* --------------------------------------------------------------------- */
 266
 267 /* The exported routines */
 268
 269 int sisfb_initaccel(struct sis_video_info *ivideo)
 270 {
 271 #ifdef SISFB_USE_SPINLOCKS
 272         spin_lock_init(&ivideo->lockaccel);
 273 #endif
 274         return 0;
 275 }
 276
 277 void sisfb_syncaccel(struct sis_video_info *ivideo)
 278 {
 279         if(ivideo->sisvga_engine == SIS_300_VGA) {
 280 #ifdef CONFIG_FB_SIS_300
 281                 SiS300Sync(ivideo);
 282 #endif
 283         } else {
 284 #ifdef CONFIG_FB_SIS_315
 285                 SiS310Sync(ivideo);
 286 #endif
 287         }
 288 }
 289
 290 int fbcon_sis_sync(struct fb_info *info)
 291 {
 292         struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
 293         CRITFLAGS
 294
 295         if((!ivideo->accel) || (!ivideo->engineok))
 296                 return 0;
 297
 298         CRITBEGIN
 299         sisfb_syncaccel(ivideo);
 300         CRITEND
 301
 302         return 0;
 303 }
 304
 305 void fbcon_sis_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 306 {
 307         struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
 308         u32 col = 0;
 309         u32 vxres = info->var.xres_virtual;
 310         u32 vyres = info->var.yres_virtual;
 311         int width, height;
 312         CRITFLAGS
 313
 314         if(info->state != FBINFO_STATE_RUNNING)
 315                 return;
 316
 317         if((!ivideo->accel) || (!ivideo->engineok)) {
 318                 cfb_fillrect(info, rect);
 319                 return;
 320         }
 321
 322         if(!rect->width || !rect->height || rect->dx >= vxres || rect->dy >= vyres)
 323                 return;
 324
 325         /* Clipping */
 326         width = ((rect->dx + rect->width) > vxres) ? (vxres - rect->dx) : rect->width;
 327         height = ((rect->dy + rect->height) > vyres) ? (vyres - rect->dy) : rect->height;
 328
 329         switch(info->var.bits_per_pixel) {
 330         case 8:  col = rect->color;
 331                  break;
 332         case 16:
 333         case 32: col = ((u32 *)(info->pseudo_palette))[rect->color];
 334                  break;
 335         }
 336
 337         if(ivideo->sisvga_engine == SIS_300_VGA) {
 338 #ifdef CONFIG_FB_SIS_300
 339                 CRITBEGIN
 340                 SiS300SetupForSolidFill(ivideo, col, myrops[rect->rop]);
 341                 SiS300SubsequentSolidFillRect(ivideo, rect->dx, rect->dy, width, height);
 342                 CRITEND
 343 #endif
 344         } else {
 345 #ifdef CONFIG_FB_SIS_315
 346                 CRITBEGIN
 347                 SiS310SetupForSolidFill(ivideo, col, myrops[rect->rop]);
 348                 SiS310SubsequentSolidFillRect(ivideo, rect->dx, rect->dy, width, height);
 349                 CRITEND
 350 #endif
 351         }
 352
 353         sisfb_syncaccel(ivideo);
 354 }
 355
 356 void fbcon_sis_copyarea(struct fb_info *info, const struct fb_copyarea *area)
 357 {
 358         struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
 359         u32 vxres = info->var.xres_virtual;
 360         u32 vyres = info->var.yres_virtual;
 361         int width = area->width;
 362         int height = area->height;
 363         CRITFLAGS
 364
 365         if(info->state != FBINFO_STATE_RUNNING)
 366                 return;
 367
 368         if((!ivideo->accel) || (!ivideo->engineok)) {
 369                 cfb_copyarea(info, area);
 370                 return;
 371         }
 372
 373         if(!width || !height ||
 374            area->sx >= vxres || area->sy >= vyres ||
 375            area->dx >= vxres || area->dy >= vyres)
 376                 return;
 377
 378         /* Clipping */
 379         if((area->sx + width) > vxres) width = vxres - area->sx;
 380         if((area->dx + width) > vxres) width = vxres - area->dx;
 381         if((area->sy + height) > vyres) height = vyres - area->sy;
 382         if((area->dy + height) > vyres) height = vyres - area->dy;
 383
 384         if(ivideo->sisvga_engine == SIS_300_VGA) {
 385 #ifdef CONFIG_FB_SIS_300
 386                 int xdir, ydir;
 387
 388                 if(area->sx < area->dx) xdir = 0;
 389                 else                    xdir = 1;
 390                 if(area->sy < area->dy) ydir = 0;
 391                 else                    ydir = 1;
 392
 393                 CRITBEGIN
 394                 SiS300SetupForScreenToScreenCopy(ivideo, xdir, ydir, 3, -1);
 395                 SiS300SubsequentScreenToScreenCopy(ivideo, area->sx, area->sy,
 396                                         area->dx, area->dy, width, height);
 397                 CRITEND
 398 #endif
 399         } else {
 400 #ifdef CONFIG_FB_SIS_315
 401                 CRITBEGIN
 402                 SiS310SetupForScreenToScreenCopy(ivideo, 3, -1);
 403                 SiS310SubsequentScreenToScreenCopy(ivideo, area->sx, area->sy,
 404                                         area->dx, area->dy, width, height);
 405                 CRITEND
 406 #endif
 407         }
 408
 409         sisfb_syncaccel(ivideo);
 410 }