drivers/staging/xgifb/XGI_accel.c

   1 /*
   2  * XGI 300/630/730/540/315/550/650/740 frame buffer driver
   3  * for Linux kernels 2.4.x and 2.5.x
   4  *
   5  * 2D acceleration part
   6  *
   7  * Based on the X driver's XGI300_accel.c which is
   8  *     Copyright Xavier Ducoin <x.ducoin@lectra.com>
   9  *     Copyright 2002 by Thomas Winischhofer, Vienna, Austria
  10  * and XGI310_accel.c which is
  11  *     Copyright 2002 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/config.h>
  19 #include <linux/version.h>
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/errno.h>
  23 #include <linux/string.h>
  24 #include <linux/mm.h>
  25 #include <linux/tty.h>
  26 #include <linux/slab.h>
  27 #include <linux/delay.h>
  28 #include <linux/fb.h>
  29 #include <linux/console.h>
  30 #include <linux/selection.h>
  31 #include <linux/ioport.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/vt_kern.h>
  35 #include <linux/capability.h>
  36 #include <linux/fs.h>
  37 #include <linux/agp_backend.h>
  38
  39 #include <linux/types.h>
  40 #include <asm/io.h>
  41
  42 #ifdef CONFIG_MTRR
  43 #include <asm/mtrr.h>
  44 #endif
  45
  46 #include "vgatypes.h"
  47 #include "vb_struct.h"
  48 #include "XGIfb.h"
  49 #include "XGI_accel.h"
  50
  51 static const int XGIALUConv[] =
  52 {
  53     0x00,       /* dest = 0;            0,      GXclear,        0 */
  54     0x88,       /* dest &= src;         DSa,    GXand,          0x1 */
  55     0x44,       /* dest = src & ~dest;  SDna,   GXandReverse,   0x2 */
  56     0xCC,       /* dest = src;          S,      GXcopy,         0x3 */
  57     0x22,       /* dest &= ~src;        DSna,   GXandInverted,  0x4 */
  58     0xAA,       /* dest = dest;         D,      GXnoop,         0x5 */
  59     0x66,       /* dest = ^src;         DSx,    GXxor,          0x6 */
  60     0xEE,       /* dest |= src;         DSo,    GXor,           0x7 */
  61     0x11,       /* dest = ~src & ~dest; DSon,   GXnor,          0x8 */
  62     0x99,       /* dest ^= ~src ;       DSxn,   GXequiv,        0x9 */
  63     0x55,       /* dest = ~dest;        Dn,     GXInvert,       0xA */
  64     0xDD,       /* dest = src|~dest ;   SDno,   GXorReverse,    0xB */
  65     0x33,       /* dest = ~src;         Sn,     GXcopyInverted, 0xC */
  66     0xBB,       /* dest |= ~src;        DSno,   GXorInverted,   0xD */
  67     0x77,       /* dest = ~src|~dest;   DSan,   GXnand,         0xE */
  68     0xFF,       /* dest = 0xFF;         1,      GXset,          0xF */
  69 };
  70 /* same ROP but with Pattern as Source */
  71 static const int XGIPatALUConv[] =
  72 {
  73     0x00,       /* dest = 0;            0,      GXclear,        0 */
  74     0xA0,       /* dest &= src;         DPa,    GXand,          0x1 */
  75     0x50,       /* dest = src & ~dest;  PDna,   GXandReverse,   0x2 */
  76     0xF0,       /* dest = src;          P,      GXcopy,         0x3 */
  77     0x0A,       /* dest &= ~src;        DPna,   GXandInverted,  0x4 */
  78     0xAA,       /* dest = dest;         D,      GXnoop,         0x5 */
  79     0x5A,       /* dest = ^src;         DPx,    GXxor,          0x6 */
  80     0xFA,       /* dest |= src;         DPo,    GXor,           0x7 */
  81     0x05,       /* dest = ~src & ~dest; DPon,   GXnor,          0x8 */
  82     0xA5,       /* dest ^= ~src ;       DPxn,   GXequiv,        0x9 */
  83     0x55,       /* dest = ~dest;        Dn,     GXInvert,       0xA */
  84     0xF5,       /* dest = src|~dest ;   PDno,   GXorReverse,    0xB */
  85     0x0F,       /* dest = ~src;         Pn,     GXcopyInverted, 0xC */
  86     0xAF,       /* dest |= ~src;        DPno,   GXorInverted,   0xD */
  87     0x5F,       /* dest = ~src|~dest;   DPan,   GXnand,         0xE */
  88     0xFF,       /* dest = 0xFF;         1,      GXset,          0xF */
  89 };
  90
  91 static const unsigned char myrops[] = {
  92         3, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
  93    };
  94
  95 /* 300 series */
  96 static void
  97 XGI310Sync(void)
  98 {
  99         XGI310Idle
 100 }
 101
 102 /* 310/325 series ------------------------------------------------ */
 103
 104 static void
 105 XGI310SetupForScreenToScreenCopy(int xdir, int ydir, int rop,
 106                                 unsigned int planemask, int trans_color)
 107 {
 108         XGI310SetupDSTColorDepth(xgi_video_info.DstColor);
 109         XGI310SetupSRCPitch(xgi_video_info.video_linelength)
 110         XGI310SetupDSTRect(xgi_video_info.video_linelength, 0xFFF)
 111         if (trans_color != -1) {
 112                 XGI310SetupROP(0x0A)
 113                 XGI310SetupSRCTrans(trans_color)
 114                 XGI310SetupCMDFlag(TRANSPARENT_BITBLT)
 115         } else {
 116                 XGI310SetupROP(XGIALUConv[rop])
 117                 /* Set command - not needed, both 0 */
 118                 /* XGISetupCMDFlag(BITBLT | SRCVIDEO) */
 119         }
 120         XGI310SetupCMDFlag(xgi_video_info.XGI310_AccelDepth)
 121         /* TW: The 310/325 series is smart enough to know the direction */
 122 }
 123
 124 static void
 125 XGI310SubsequentScreenToScreenCopy(int src_x, int src_y, int dst_x, int dst_y,
 126                                 int width, int height)
 127 {
 128         long srcbase, dstbase;
 129         int mymin, mymax;
 130
 131         srcbase = dstbase = 0;
 132         mymin = min(src_y, dst_y);
 133         mymax = max(src_y, dst_y);
 134
 135         /* Although the chip knows the direction to use
 136          * if the source and destination areas overlap,
 137          * that logic fails if we fiddle with the bitmap
 138          * addresses. Therefore, we check if the source
 139          * and destination blitting areas overlap and
 140          * adapt the bitmap addresses synchronously
 141          * if the coordinates exceed the valid range.
 142          * The the areas do not overlap, we do our
 143          * normal check.
 144          */
 145         if((mymax - mymin) < height) {
 146            if((src_y >= 2048) || (dst_y >= 2048)) {
 147               srcbase = xgi_video_info.video_linelength * mymin;
 148               dstbase = xgi_video_info.video_linelength * mymin;
 149               src_y -= mymin;
 150               dst_y -= mymin;
 151            }
 152         } else {
 153            if(src_y >= 2048) {
 154               srcbase = xgi_video_info.video_linelength * src_y;
 155               src_y = 0;
 156            }
 157            if(dst_y >= 2048) {
 158               dstbase = xgi_video_info.video_linelength * dst_y;
 159               dst_y = 0;
 160            }
 161         }
 162
 163         XGI310SetupSRCBase(srcbase);
 164         XGI310SetupDSTBase(dstbase);
 165         XGI310SetupRect(width, height)
 166         XGI310SetupSRCXY(src_x, src_y)
 167         XGI310SetupDSTXY(dst_x, dst_y)
 168         XGI310DoCMD
 169 }
 170
 171 static void
 172 XGI310SetupForSolidFill(int color, int rop, unsigned int planemask)
 173 {
 174         XGI310SetupPATFG(color)
 175         XGI310SetupDSTRect(xgi_video_info.video_linelength, 0xFFF)
 176         XGI310SetupDSTColorDepth(xgi_video_info.DstColor);
 177         XGI310SetupROP(XGIPatALUConv[rop])
 178         XGI310SetupCMDFlag(PATFG | xgi_video_info.XGI310_AccelDepth)
 179 }
 180
 181 static void
 182 XGI310SubsequentSolidFillRect(int x, int y, int w, int h)
 183 {
 184         long dstbase;
 185
 186         dstbase = 0;
 187         if(y >= 2048) {
 188                 dstbase = xgi_video_info.video_linelength * y;
 189                 y = 0;
 190         }
 191         XGI310SetupDSTBase(dstbase)
 192         XGI310SetupDSTXY(x,y)
 193         XGI310SetupRect(w,h)
 194         XGI310SetupCMDFlag(BITBLT)
 195         XGI310DoCMD
 196 }
 197
 198 /* --------------------------------------------------------------------- */
 199
 200 /* The exported routines */
 201
 202 int XGIfb_initaccel(void)
 203 {
 204 #ifdef XGIFB_USE_SPINLOCKS
 205     spin_lock_init(&xgi_video_info.lockaccel);
 206 #endif
 207     return(0);
 208 }
 209
 210 void XGIfb_syncaccel(void)
 211 {
 212
 213     XGI310Sync();
 214
 215 }
 216
 217 int fbcon_XGI_sync(struct fb_info *info)
 218 {
 219     if(!XGIfb_accel) return 0;
 220     CRITFLAGS
 221
 222     XGI310Sync();
 223
 224    CRITEND
 225    return 0;
 226 }
 227
 228 void fbcon_XGI_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 229 {
 230    int col=0;
 231    CRITFLAGS
 232
 233
 234    if(!rect->width || !rect->height)
 235         return;
 236
 237    if(!XGIfb_accel) {
 238         cfb_fillrect(info, rect);
 239         return;
 240    }
 241
 242    switch(info->var.bits_per_pixel) {
 243                 case 8: col = rect->color;
 244                         break;
 245                 case 16: col = ((u32 *)(info->pseudo_palette))[rect->color];
 246                          break;
 247                 case 32: col = ((u32 *)(info->pseudo_palette))[rect->color];
 248                          break;
 249         }
 250
 251
 252            CRITBEGIN
 253            XGI310SetupForSolidFill(col, myrops[rect->rop], 0);
 254            XGI310SubsequentSolidFillRect(rect->dx, rect->dy, rect->width, rect->height);
 255            CRITEND
 256            XGI310Sync();
 257
 258
 259 }
 260
 261 void fbcon_XGI_copyarea(struct fb_info *info, const struct fb_copyarea *area)
 262 {
 263    int xdir, ydir;
 264    CRITFLAGS
 265
 266
 267    if(!XGIfb_accel) {
 268         cfb_copyarea(info, area);
 269         return;
 270    }
 271
 272    if(!area->width || !area->height)
 273         return;
 274
 275    if(area->sx < area->dx) xdir = 0;
 276    else                    xdir = 1;
 277    if(area->sy < area->dy) ydir = 0;
 278    else                    ydir = 1;
 279
 280       CRITBEGIN
 281       XGI310SetupForScreenToScreenCopy(xdir, ydir, 3, 0, -1);
 282       XGI310SubsequentScreenToScreenCopy(area->sx, area->sy, area->dx, area->dy, area->width, area->height);
 283       CRITEND
 284       XGI310Sync();
 285
 286 }
 287
 288
 289