drivers/video/aty/mach64_accel.c

   1
   2 /*
   3  *  ATI Mach64 Hardware Acceleration
   4  */
   5
   6 #include <linux/delay.h>
   7 #include <linux/fb.h>
   8 #include <video/mach64.h>
   9 #include "atyfb.h"
  10
  11     /*
  12      *  Generic Mach64 routines
  13      */
  14
  15 /* this is for DMA GUI engine! work in progress */
  16 typedef struct {
  17         u32 frame_buf_offset;
  18         u32 system_mem_addr;
  19         u32 command;
  20         u32 reserved;
  21 } BM_DESCRIPTOR_ENTRY;
  22
  23 #define LAST_DESCRIPTOR (1 << 31)
  24 #define SYSTEM_TO_FRAME_BUFFER 0
  25
  26 static u32 rotation24bpp(u32 dx, u32 direction)
  27 {
  28         u32 rotation;
  29         if (direction & DST_X_LEFT_TO_RIGHT) {
  30                 rotation = (dx / 4) % 6;
  31         } else {
  32                 rotation = ((dx + 2) / 4) % 6;
  33         }
  34
  35         return ((rotation << 8) | DST_24_ROTATION_ENABLE);
  36 }
  37
  38 void aty_reset_engine(const struct atyfb_par *par)
  39 {
  40         /* reset engine */
  41         aty_st_le32(GEN_TEST_CNTL,
  42                 aty_ld_le32(GEN_TEST_CNTL, par) &
  43                 ~(GUI_ENGINE_ENABLE | HWCURSOR_ENABLE), par);
  44         /* enable engine */
  45         aty_st_le32(GEN_TEST_CNTL,
  46                 aty_ld_le32(GEN_TEST_CNTL, par) | GUI_ENGINE_ENABLE, par);
  47         /* ensure engine is not locked up by clearing any FIFO or */
  48         /* HOST errors */
  49         aty_st_le32(BUS_CNTL,
  50                 aty_ld_le32(BUS_CNTL, par) | BUS_HOST_ERR_ACK | BUS_FIFO_ERR_ACK, par);
  51 }
  52
  53 static void reset_GTC_3D_engine(const struct atyfb_par *par)
  54 {
  55         aty_st_le32(SCALE_3D_CNTL, 0xc0, par);
  56         mdelay(GTC_3D_RESET_DELAY);
  57         aty_st_le32(SETUP_CNTL, 0x00, par);
  58         mdelay(GTC_3D_RESET_DELAY);
  59         aty_st_le32(SCALE_3D_CNTL, 0x00, par);
  60         mdelay(GTC_3D_RESET_DELAY);
  61 }
  62
  63 void aty_init_engine(struct atyfb_par *par, struct fb_info *info)
  64 {
  65         u32 pitch_value;
  66         u32 vxres;
  67
  68         /* determine modal information from global mode structure */
  69         pitch_value = info->fix.line_length / (info->var.bits_per_pixel / 8);
  70         vxres = info->var.xres_virtual;
  71
  72         if (info->var.bits_per_pixel == 24) {
  73                 /* In 24 bpp, the engine is in 8 bpp - this requires that all */
  74                 /* horizontal coordinates and widths must be adjusted */
  75                 pitch_value *= 3;
  76                 vxres *= 3;
  77         }
  78
  79         /* On GTC (RagePro), we need to reset the 3D engine before */
  80         if (M64_HAS(RESET_3D))
  81                 reset_GTC_3D_engine(par);
  82
  83         /* Reset engine, enable, and clear any engine errors */
  84         aty_reset_engine(par);
  85         /* Ensure that vga page pointers are set to zero - the upper */
  86         /* page pointers are set to 1 to handle overflows in the */
  87         /* lower page */
  88         aty_st_le32(MEM_VGA_WP_SEL, 0x00010000, par);
  89         aty_st_le32(MEM_VGA_RP_SEL, 0x00010000, par);
  90
  91         /* ---- Setup standard engine context ---- */
  92
  93         /* All GUI registers here are FIFOed - therefore, wait for */
  94         /* the appropriate number of empty FIFO entries */
  95         wait_for_fifo(14, par);
  96
  97         /* enable all registers to be loaded for context loads */
  98         aty_st_le32(CONTEXT_MASK, 0xFFFFFFFF, par);
  99
 100         /* set destination pitch to modal pitch, set offset to zero */
 101         aty_st_le32(DST_OFF_PITCH, (pitch_value / 8) << 22, par);
 102
 103         /* zero these registers (set them to a known state) */
 104         aty_st_le32(DST_Y_X, 0, par);
 105         aty_st_le32(DST_HEIGHT, 0, par);
 106         aty_st_le32(DST_BRES_ERR, 0, par);
 107         aty_st_le32(DST_BRES_INC, 0, par);
 108         aty_st_le32(DST_BRES_DEC, 0, par);
 109
 110         /* set destination drawing attributes */
 111         aty_st_le32(DST_CNTL, DST_LAST_PEL | DST_Y_TOP_TO_BOTTOM |
 112                     DST_X_LEFT_TO_RIGHT, par);
 113
 114         /* set source pitch to modal pitch, set offset to zero */
 115         aty_st_le32(SRC_OFF_PITCH, (pitch_value / 8) << 22, par);
 116
 117         /* set these registers to a known state */
 118         aty_st_le32(SRC_Y_X, 0, par);
 119         aty_st_le32(SRC_HEIGHT1_WIDTH1, 1, par);
 120         aty_st_le32(SRC_Y_X_START, 0, par);
 121         aty_st_le32(SRC_HEIGHT2_WIDTH2, 1, par);
 122
 123         /* set source pixel retrieving attributes */
 124         aty_st_le32(SRC_CNTL, SRC_LINE_X_LEFT_TO_RIGHT, par);
 125
 126         /* set host attributes */
 127         wait_for_fifo(13, par);
 128         aty_st_le32(HOST_CNTL, 0, par);
 129
 130         /* set pattern attributes */
 131         aty_st_le32(PAT_REG0, 0, par);
 132         aty_st_le32(PAT_REG1, 0, par);
 133         aty_st_le32(PAT_CNTL, 0, par);
 134
 135         /* set scissors to modal size */
 136         aty_st_le32(SC_LEFT, 0, par);
 137         aty_st_le32(SC_TOP, 0, par);
 138         aty_st_le32(SC_BOTTOM, par->crtc.vyres - 1, par);
 139         aty_st_le32(SC_RIGHT, vxres - 1, par);
 140
 141         /* set background color to minimum value (usually BLACK) */
 142         aty_st_le32(DP_BKGD_CLR, 0, par);
 143
 144         /* set foreground color to maximum value (usually WHITE) */
 145         aty_st_le32(DP_FRGD_CLR, 0xFFFFFFFF, par);
 146
 147         /* set write mask to effect all pixel bits */
 148         aty_st_le32(DP_WRITE_MASK, 0xFFFFFFFF, par);
 149
 150         /* set foreground mix to overpaint and background mix to */
 151         /* no-effect */
 152         aty_st_le32(DP_MIX, FRGD_MIX_S | BKGD_MIX_D, par);
 153
 154         /* set primary source pixel channel to foreground color */
 155         /* register */
 156         aty_st_le32(DP_SRC, FRGD_SRC_FRGD_CLR, par);
 157
 158         /* set compare functionality to false (no-effect on */
 159         /* destination) */
 160         wait_for_fifo(3, par);
 161         aty_st_le32(CLR_CMP_CLR, 0, par);
 162         aty_st_le32(CLR_CMP_MASK, 0xFFFFFFFF, par);
 163         aty_st_le32(CLR_CMP_CNTL, 0, par);
 164
 165         /* set pixel depth */
 166         wait_for_fifo(2, par);
 167         aty_st_le32(DP_PIX_WIDTH, par->crtc.dp_pix_width, par);
 168         aty_st_le32(DP_CHAIN_MASK, par->crtc.dp_chain_mask, par);
 169
 170         wait_for_fifo(5, par);
 171         aty_st_le32(SCALE_3D_CNTL, 0, par);
 172         aty_st_le32(Z_CNTL, 0, par);
 173         aty_st_le32(CRTC_INT_CNTL, aty_ld_le32(CRTC_INT_CNTL, par) & ~0x20,
 174                     par);
 175         aty_st_le32(GUI_TRAJ_CNTL, 0x100023, par);
 176
 177         /* insure engine is idle before leaving */
 178         wait_for_idle(par);
 179 }
 180
 181     /*
 182      *  Accelerated functions
 183      */
 184
 185 static inline void draw_rect(s16 x, s16 y, u16 width, u16 height,
 186                              struct atyfb_par *par)
 187 {
 188         /* perform rectangle fill */
 189         wait_for_fifo(2, par);
 190         aty_st_le32(DST_Y_X, (x << 16) | y, par);
 191         aty_st_le32(DST_HEIGHT_WIDTH, (width << 16) | height, par);
 192         par->blitter_may_be_busy = 1;
 193 }
 194
 195 void atyfb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
 196 {
 197         struct atyfb_par *par = (struct atyfb_par *) info->par;
 198         u32 dy = area->dy, sy = area->sy, direction = DST_LAST_PEL;
 199         u32 sx = area->sx, dx = area->dx, width = area->width, rotation = 0;
 200
 201         if (par->asleep)
 202                 return;
 203         if (!area->width || !area->height)
 204                 return;
 205         if (!par->accel_flags) {
 206                 cfb_copyarea(info, area);
 207                 return;
 208         }
 209
 210         if (info->var.bits_per_pixel == 24) {
 211                 /* In 24 bpp, the engine is in 8 bpp - this requires that all */
 212                 /* horizontal coordinates and widths must be adjusted */
 213                 sx *= 3;
 214                 dx *= 3;
 215                 width *= 3;
 216         }
 217
 218         if (area->sy < area->dy) {
 219                 dy += area->height - 1;
 220                 sy += area->height - 1;
 221         } else
 222                 direction |= DST_Y_TOP_TO_BOTTOM;
 223
 224         if (sx < dx) {
 225                 dx += width - 1;
 226                 sx += width - 1;
 227         } else
 228                 direction |= DST_X_LEFT_TO_RIGHT;
 229
 230         if (info->var.bits_per_pixel == 24) {
 231                 rotation = rotation24bpp(dx, direction);
 232         }
 233
 234         wait_for_fifo(4, par);
 235         aty_st_le32(DP_SRC, FRGD_SRC_BLIT, par);
 236         aty_st_le32(SRC_Y_X, (sx << 16) | sy, par);
 237         aty_st_le32(SRC_HEIGHT1_WIDTH1, (width << 16) | area->height, par);
 238         aty_st_le32(DST_CNTL, direction | rotation, par);
 239         draw_rect(dx, dy, width, area->height, par);
 240 }
 241
 242 void atyfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 243 {
 244         struct atyfb_par *par = (struct atyfb_par *) info->par;
 245         u32 color = rect->color, dx = rect->dx, width = rect->width, rotation = 0;
 246
 247         if (par->asleep)
 248                 return;
 249         if (!rect->width || !rect->height)
 250                 return;
 251         if (!par->accel_flags) {
 252                 cfb_fillrect(info, rect);
 253                 return;
 254         }
 255
 256         color |= (rect->color << 8);
 257         color |= (rect->color << 16);
 258
 259         if (info->var.bits_per_pixel == 24) {
 260                 /* In 24 bpp, the engine is in 8 bpp - this requires that all */
 261                 /* horizontal coordinates and widths must be adjusted */
 262                 dx *= 3;
 263                 width *= 3;
 264                 rotation = rotation24bpp(dx, DST_X_LEFT_TO_RIGHT);
 265         }
 266
 267         wait_for_fifo(3, par);
 268         aty_st_le32(DP_FRGD_CLR, color, par);
 269         aty_st_le32(DP_SRC,
 270                     BKGD_SRC_BKGD_CLR | FRGD_SRC_FRGD_CLR | MONO_SRC_ONE,
 271                     par);
 272         aty_st_le32(DST_CNTL,
 273                     DST_LAST_PEL | DST_Y_TOP_TO_BOTTOM |
 274                     DST_X_LEFT_TO_RIGHT | rotation, par);
 275         draw_rect(dx, rect->dy, width, rect->height, par);
 276 }
 277
 278 void atyfb_imageblit(struct fb_info *info, const struct fb_image *image)
 279 {
 280         struct atyfb_par *par = (struct atyfb_par *) info->par;
 281         u32 src_bytes, dx = image->dx, dy = image->dy, width = image->width;
 282         u32 pix_width_save, pix_width, host_cntl, rotation = 0, src, mix;
 283
 284         if (par->asleep)
 285                 return;
 286         if (!image->width || !image->height)
 287                 return;
 288         if (!par->accel_flags ||
 289             (image->depth != 1 && info->var.bits_per_pixel != image->depth)) {
 290                 cfb_imageblit(info, image);
 291                 return;
 292         }
 293
 294         pix_width = pix_width_save = aty_ld_le32(DP_PIX_WIDTH, par);
 295         host_cntl = aty_ld_le32(HOST_CNTL, par) | HOST_BYTE_ALIGN;
 296
 297         switch (image->depth) {
 298         case 1:
 299             pix_width &= ~(BYTE_ORDER_MASK | HOST_MASK);
 300             pix_width |= (BYTE_ORDER_MSB_TO_LSB | HOST_1BPP);
 301             break;
 302         case 4:
 303             pix_width &= ~(BYTE_ORDER_MASK | HOST_MASK);
 304             pix_width |= (BYTE_ORDER_MSB_TO_LSB | HOST_4BPP);
 305             break;
 306         case 8:
 307             pix_width &= ~HOST_MASK;
 308             pix_width |= HOST_8BPP;
 309             break;
 310         case 15:
 311             pix_width &= ~HOST_MASK;
 312             pix_width |= HOST_15BPP;
 313             break;
 314         case 16:
 315             pix_width &= ~HOST_MASK;
 316             pix_width |= HOST_16BPP;
 317             break;
 318         case 24:
 319             pix_width &= ~HOST_MASK;
 320             pix_width |= HOST_24BPP;
 321             break;
 322         case 32:
 323             pix_width &= ~HOST_MASK;
 324             pix_width |= HOST_32BPP;
 325             break;
 326         }
 327
 328         if (info->var.bits_per_pixel == 24) {
 329                 /* In 24 bpp, the engine is in 8 bpp - this requires that all */
 330                 /* horizontal coordinates and widths must be adjusted */
 331                 dx *= 3;
 332                 width *= 3;
 333
 334                 rotation = rotation24bpp(dx, DST_X_LEFT_TO_RIGHT);
 335
 336                 pix_width &= ~DST_MASK;
 337                 pix_width |= DST_8BPP;
 338
 339                 /*
 340                  * since Rage 3D IIc we have DP_HOST_TRIPLE_EN bit
 341                  * this hwaccelerated triple has an issue with not aligned data
 342                  */
 343                 if (M64_HAS(HW_TRIPLE) && image->width % 8 == 0)
 344                         pix_width |= DP_HOST_TRIPLE_EN;
 345         }
 346
 347         if (image->depth == 1) {
 348                 u32 fg, bg;
 349                 if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
 350                     info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
 351                         fg = ((u32*)(info->pseudo_palette))[image->fg_color];
 352                         bg = ((u32*)(info->pseudo_palette))[image->bg_color];
 353                 } else {
 354                         fg = image->fg_color;
 355                         bg = image->bg_color;
 356                 }
 357
 358                 wait_for_fifo(2, par);
 359                 aty_st_le32(DP_BKGD_CLR, bg, par);
 360                 aty_st_le32(DP_FRGD_CLR, fg, par);
 361                 src = MONO_SRC_HOST | FRGD_SRC_FRGD_CLR | BKGD_SRC_BKGD_CLR;
 362                 mix = FRGD_MIX_S | BKGD_MIX_S;
 363         } else {
 364                 src = MONO_SRC_ONE | FRGD_SRC_HOST;
 365                 mix = FRGD_MIX_D_XOR_S | BKGD_MIX_D;
 366         }
 367
 368         wait_for_fifo(6, par);
 369         aty_st_le32(DP_WRITE_MASK, 0xFFFFFFFF, par);
 370         aty_st_le32(DP_PIX_WIDTH, pix_width, par);
 371         aty_st_le32(DP_MIX, mix, par);
 372         aty_st_le32(DP_SRC, src, par);
 373         aty_st_le32(HOST_CNTL, host_cntl, par);
 374         aty_st_le32(DST_CNTL, DST_Y_TOP_TO_BOTTOM | DST_X_LEFT_TO_RIGHT | rotation, par);
 375
 376         draw_rect(dx, dy, width, image->height, par);
 377         src_bytes = (((image->width * image->depth) + 7) / 8) * image->height;
 378
 379         /* manual triple each pixel */
 380         if (info->var.bits_per_pixel == 24 && !(pix_width & DP_HOST_TRIPLE_EN)) {
 381                 int inbit, outbit, mult24, byte_id_in_dword, width;
 382                 u8 *pbitmapin = (u8*)image->data, *pbitmapout;
 383                 u32 hostdword;
 384
 385                 for (width = image->width, inbit = 7, mult24 = 0; src_bytes; ) {
 386                         for (hostdword = 0, pbitmapout = (u8*)&hostdword, byte_id_in_dword = 0;
 387                                 byte_id_in_dword < 4 && src_bytes;
 388                                 byte_id_in_dword++, pbitmapout++) {
 389                                 for (outbit = 7; outbit >= 0; outbit--) {
 390                                         *pbitmapout |= (((*pbitmapin >> inbit) & 1) << outbit);
 391                                         mult24++;
 392                                         /* next bit */
 393                                         if (mult24 == 3) {
 394                                                 mult24 = 0;
 395                                                 inbit--;
 396                                                 width--;
 397                                         }
 398
 399                                         /* next byte */
 400                                         if (inbit < 0 || width == 0) {
 401                                                 src_bytes--;
 402                                                 pbitmapin++;
 403                                                 inbit = 7;
 404
 405                                                 if (width == 0) {
 406                                                     width = image->width;
 407                                                     outbit = 0;
 408                                                 }
 409                                         }
 410                                 }
 411                         }
 412                         wait_for_fifo(1, par);
 413                         aty_st_le32(HOST_DATA0, hostdword, par);
 414                 }
 415         } else {
 416                 u32 *pbitmap, dwords = (src_bytes + 3) / 4;
 417                 for (pbitmap = (u32*)(image->data); dwords; dwords--, pbitmap++) {
 418                         wait_for_fifo(1, par);
 419                         aty_st_le32(HOST_DATA0, le32_to_cpup(pbitmap), par);
 420                 }
 421         }
 422
 423         /* restore pix_width */
 424         wait_for_fifo(1, par);
 425         aty_st_le32(DP_PIX_WIDTH, pix_width_save, par);
 426 }