LXR linux/drivers/video/fbdev/sis/sis

   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
  28static 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 */
  48static 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
  68static 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
  74static void
  75SiS300Sync(struct sis_video_info *ivideo)
  76{
  77        SiS300Idle
  78}
  79
  80static void
  81SiS300SetupForScreenToScreenCopy(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
 103static void
 104SiS300SubsequentScreenToScreenCopy(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
 135static void
 136SiS300SetupForSolidFill(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
 145static void
 146SiS300SubsequentSolidFillRect(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
 165static void
 166SiS310Sync(struct sis_video_info *ivideo)
 167{
 168        SiS310Idle
 169}
 170
 171static void
 172SiS310SetupForScreenToScreenCopy(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
 190static void
 191SiS310SubsequentScreenToScreenCopy(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
 237static void
 238SiS310SetupForSolidFill(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
 247static void
 248SiS310SubsequentSolidFillRect(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
 269int 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
 277void 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
 290int 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
 305void 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
 356void 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}
 411