SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/video/intelfb/intelfbhw.c

   1 /*
   2  * intelfb
   3  *
   4  * Linux framebuffer driver for Intel(R) 865G integrated graphics chips.
   5  *
   6  * Copyright © 2002, 2003 David Dawes <dawes@xfree86.org>
   7  *                   2004 Sylvain Meyer
   8  *
   9  * This driver consists of two parts.  The first part (intelfbdrv.c) provides
  10  * the basic fbdev interfaces, is derived in part from the radeonfb and
  11  * vesafb drivers, and is covered by the GPL.  The second part (intelfbhw.c)
  12  * provides the code to program the hardware.  Most of it is derived from
  13  * the i810/i830 XFree86 driver.  The HW-specific code is covered here
  14  * under a dual license (GPL and MIT/XFree86 license).
  15  *
  16  * Author: David Dawes
  17  *
  18  */
  19
  20 /* $DHD: intelfb/intelfbhw.c,v 1.9 2003/06/27 15:06:25 dawes Exp $ */
  21
  22 #include <linux/config.h>
  23 #include <linux/module.h>
  24 #include <linux/kernel.h>
  25 #include <linux/errno.h>
  26 #include <linux/string.h>
  27 #include <linux/mm.h>
  28 #include <linux/tty.h>
  29 #include <linux/slab.h>
  30 #include <linux/delay.h>
  31 #include <linux/fb.h>
  32 #include <linux/ioport.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/vmalloc.h>
  36 #include <linux/pagemap.h>
  37 #include <linux/interrupt.h>
  38
  39 #include <asm/io.h>
  40
  41 #include "intelfb.h"
  42 #include "intelfbhw.h"
  43
  44 struct pll_min_max {
  45         int min_m, max_m, min_m1, max_m1;
  46         int min_m2, max_m2, min_n, max_n;
  47         int min_p, max_p, min_p1, max_p1;
  48         int min_vco, max_vco, p_transition_clk, ref_clk;
  49         int p_inc_lo, p_inc_hi;
  50 };
  51
  52 #define PLLS_I8xx 0
  53 #define PLLS_I9xx 1
  54 #define PLLS_MAX 2
  55
  56 static struct pll_min_max plls[PLLS_MAX] = {
  57         { 108, 140, 18, 26,
  58           6, 16, 3, 16,
  59           4, 128, 0, 31,
  60           930000, 1400000, 165000, 48000,
  61           4, 2 }, //I8xx
  62
  63         { 75, 120, 10, 20,
  64           5, 9, 4, 7,
  65           5, 80, 1, 8,
  66           1400000, 2800000, 200000, 96000,
  67           10, 5 }  //I9xx
  68 };
  69
  70 int
  71 intelfbhw_get_chipset(struct pci_dev *pdev, struct intelfb_info *dinfo)
  72 {
  73         u32 tmp;
  74         if (!pdev || !dinfo)
  75                 return 1;
  76
  77         switch (pdev->device) {
  78         case PCI_DEVICE_ID_INTEL_830M:
  79                 dinfo->name = "Intel(R) 830M";
  80                 dinfo->chipset = INTEL_830M;
  81                 dinfo->mobile = 1;
  82                 dinfo->pll_index = PLLS_I8xx;
  83                 return 0;
  84         case PCI_DEVICE_ID_INTEL_845G:
  85                 dinfo->name = "Intel(R) 845G";
  86                 dinfo->chipset = INTEL_845G;
  87                 dinfo->mobile = 0;
  88                 dinfo->pll_index = PLLS_I8xx;
  89                 return 0;
  90         case PCI_DEVICE_ID_INTEL_85XGM:
  91                 tmp = 0;
  92                 dinfo->mobile = 1;
  93                 dinfo->pll_index = PLLS_I8xx;
  94                 pci_read_config_dword(pdev, INTEL_85X_CAPID, &tmp);
  95                 switch ((tmp >> INTEL_85X_VARIANT_SHIFT) &
  96                         INTEL_85X_VARIANT_MASK) {
  97                 case INTEL_VAR_855GME:
  98                         dinfo->name = "Intel(R) 855GME";
  99                         dinfo->chipset = INTEL_855GME;
 100                         return 0;
 101                 case INTEL_VAR_855GM:
 102                         dinfo->name = "Intel(R) 855GM";
 103                         dinfo->chipset = INTEL_855GM;
 104                         return 0;
 105                 case INTEL_VAR_852GME:
 106                         dinfo->name = "Intel(R) 852GME";
 107                         dinfo->chipset = INTEL_852GME;
 108                         return 0;
 109                 case INTEL_VAR_852GM:
 110                         dinfo->name = "Intel(R) 852GM";
 111                         dinfo->chipset = INTEL_852GM;
 112                         return 0;
 113                 default:
 114                         dinfo->name = "Intel(R) 852GM/855GM";
 115                         dinfo->chipset = INTEL_85XGM;
 116                         return 0;
 117                 }
 118                 break;
 119         case PCI_DEVICE_ID_INTEL_865G:
 120                 dinfo->name = "Intel(R) 865G";
 121                 dinfo->chipset = INTEL_865G;
 122                 dinfo->mobile = 0;
 123                 dinfo->pll_index = PLLS_I8xx;
 124                 return 0;
 125         case PCI_DEVICE_ID_INTEL_915G:
 126                 dinfo->name = "Intel(R) 915G";
 127                 dinfo->chipset = INTEL_915G;
 128                 dinfo->mobile = 0;
 129                 dinfo->pll_index = PLLS_I9xx;
 130                 return 0;
 131         case PCI_DEVICE_ID_INTEL_915GM:
 132                 dinfo->name = "Intel(R) 915GM";
 133                 dinfo->chipset = INTEL_915GM;
 134                 dinfo->mobile = 1;
 135                 dinfo->pll_index = PLLS_I9xx;
 136                 return 0;
 137         case PCI_DEVICE_ID_INTEL_945G:
 138                 dinfo->name = "Intel(R) 945G";
 139                 dinfo->chipset = INTEL_945G;
 140                 dinfo->mobile = 0;
 141                 dinfo->pll_index = PLLS_I9xx;
 142                 return 0;
 143         case PCI_DEVICE_ID_INTEL_945GM:
 144                 dinfo->name = "Intel(R) 945GM";
 145                 dinfo->chipset = INTEL_945GM;
 146                 dinfo->mobile = 1;
 147                 dinfo->pll_index = PLLS_I9xx;
 148                 return 0;
 149         default:
 150                 return 1;
 151         }
 152 }
 153
 154 int
 155 intelfbhw_get_memory(struct pci_dev *pdev, int *aperture_size,
 156                      int *stolen_size)
 157 {
 158         struct pci_dev *bridge_dev;
 159         u16 tmp;
 160         int stolen_overhead;
 161
 162         if (!pdev || !aperture_size || !stolen_size)
 163                 return 1;
 164
 165         /* Find the bridge device.  It is always 0:0.0 */
 166         if (!(bridge_dev = pci_find_slot(0, PCI_DEVFN(0, 0)))) {
 167                 ERR_MSG("cannot find bridge device\n");
 168                 return 1;
 169         }
 170
 171         /* Get the fb aperture size and "stolen" memory amount. */
 172         tmp = 0;
 173         pci_read_config_word(bridge_dev, INTEL_GMCH_CTRL, &tmp);
 174         switch (pdev->device) {
 175         case PCI_DEVICE_ID_INTEL_915G:
 176         case PCI_DEVICE_ID_INTEL_915GM:
 177         case PCI_DEVICE_ID_INTEL_945G:
 178         case PCI_DEVICE_ID_INTEL_945GM:
 179                 /* 915 and 945 chipsets support a 256MB aperture.
 180                    Aperture size is determined by inspected the
 181                    base address of the aperture. */
 182                 if (pci_resource_start(pdev, 2) & 0x08000000)
 183                         *aperture_size = MB(128);
 184                 else
 185                         *aperture_size = MB(256);
 186                 break;
 187         default:
 188                 if ((tmp & INTEL_GMCH_MEM_MASK) == INTEL_GMCH_MEM_64M)
 189                         *aperture_size = MB(64);
 190                 else
 191                         *aperture_size = MB(128);
 192                 break;
 193         }
 194
 195         /* Stolen memory size is reduced by the GTT and the popup.
 196            GTT is 1K per MB of aperture size, and popup is 4K. */
 197         stolen_overhead = (*aperture_size / MB(1)) + 4;
 198         switch(pdev->device) {
 199         case PCI_DEVICE_ID_INTEL_830M:
 200         case PCI_DEVICE_ID_INTEL_845G:
 201                 switch (tmp & INTEL_830_GMCH_GMS_MASK) {
 202                 case INTEL_830_GMCH_GMS_STOLEN_512:
 203                         *stolen_size = KB(512) - KB(stolen_overhead);
 204                         return 0;
 205                 case INTEL_830_GMCH_GMS_STOLEN_1024:
 206                         *stolen_size = MB(1) - KB(stolen_overhead);
 207                         return 0;
 208                 case INTEL_830_GMCH_GMS_STOLEN_8192:
 209                         *stolen_size = MB(8) - KB(stolen_overhead);
 210                         return 0;
 211                 case INTEL_830_GMCH_GMS_LOCAL:
 212                         ERR_MSG("only local memory found\n");
 213                         return 1;
 214                 case INTEL_830_GMCH_GMS_DISABLED:
 215                         ERR_MSG("video memory is disabled\n");
 216                         return 1;
 217                 default:
 218                         ERR_MSG("unexpected GMCH_GMS value: 0x%02x\n",
 219                                 tmp & INTEL_830_GMCH_GMS_MASK);
 220                         return 1;
 221                 }
 222                 break;
 223         default:
 224                 switch (tmp & INTEL_855_GMCH_GMS_MASK) {
 225                 case INTEL_855_GMCH_GMS_STOLEN_1M:
 226                         *stolen_size = MB(1) - KB(stolen_overhead);
 227                         return 0;
 228                 case INTEL_855_GMCH_GMS_STOLEN_4M:
 229                         *stolen_size = MB(4) - KB(stolen_overhead);
 230                         return 0;
 231                 case INTEL_855_GMCH_GMS_STOLEN_8M:
 232                         *stolen_size = MB(8) - KB(stolen_overhead);
 233                         return 0;
 234                 case INTEL_855_GMCH_GMS_STOLEN_16M:
 235                         *stolen_size = MB(16) - KB(stolen_overhead);
 236                         return 0;
 237                 case INTEL_855_GMCH_GMS_STOLEN_32M:
 238                         *stolen_size = MB(32) - KB(stolen_overhead);
 239                         return 0;
 240                 case INTEL_915G_GMCH_GMS_STOLEN_48M:
 241                         *stolen_size = MB(48) - KB(stolen_overhead);
 242                         return 0;
 243                 case INTEL_915G_GMCH_GMS_STOLEN_64M:
 244                         *stolen_size = MB(64) - KB(stolen_overhead);
 245                         return 0;
 246                 case INTEL_855_GMCH_GMS_DISABLED:
 247                         ERR_MSG("video memory is disabled\n");
 248                         return 0;
 249                 default:
 250                         ERR_MSG("unexpected GMCH_GMS value: 0x%02x\n",
 251                                 tmp & INTEL_855_GMCH_GMS_MASK);
 252                         return 1;
 253                 }
 254         }
 255 }
 256
 257 int
 258 intelfbhw_check_non_crt(struct intelfb_info *dinfo)
 259 {
 260         int dvo = 0;
 261
 262         if (INREG(LVDS) & PORT_ENABLE)
 263                 dvo |= LVDS_PORT;
 264         if (INREG(DVOA) & PORT_ENABLE)
 265                 dvo |= DVOA_PORT;
 266         if (INREG(DVOB) & PORT_ENABLE)
 267                 dvo |= DVOB_PORT;
 268         if (INREG(DVOC) & PORT_ENABLE)
 269                 dvo |= DVOC_PORT;
 270
 271         return dvo;
 272 }
 273
 274 const char *
 275 intelfbhw_dvo_to_string(int dvo)
 276 {
 277         if (dvo & DVOA_PORT)
 278                 return "DVO port A";
 279         else if (dvo & DVOB_PORT)
 280                 return "DVO port B";
 281         else if (dvo & DVOC_PORT)
 282                 return "DVO port C";
 283         else if (dvo & LVDS_PORT)
 284                 return "LVDS port";
 285         else
 286                 return NULL;
 287 }
 288
 289
 290 int
 291 intelfbhw_validate_mode(struct intelfb_info *dinfo,
 292                         struct fb_var_screeninfo *var)
 293 {
 294         int bytes_per_pixel;
 295         int tmp;
 296
 297 #if VERBOSE > 0
 298         DBG_MSG("intelfbhw_validate_mode\n");
 299 #endif
 300
 301         bytes_per_pixel = var->bits_per_pixel / 8;
 302         if (bytes_per_pixel == 3)
 303                 bytes_per_pixel = 4;
 304
 305         /* Check if enough video memory. */
 306         tmp = var->yres_virtual * var->xres_virtual * bytes_per_pixel;
 307         if (tmp > dinfo->fb.size) {
 308                 WRN_MSG("Not enough video ram for mode "
 309                         "(%d KByte vs %d KByte).\n",
 310                         BtoKB(tmp), BtoKB(dinfo->fb.size));
 311                 return 1;
 312         }
 313
 314         /* Check if x/y limits are OK. */
 315         if (var->xres - 1 > HACTIVE_MASK) {
 316                 WRN_MSG("X resolution too large (%d vs %d).\n",
 317                         var->xres, HACTIVE_MASK + 1);
 318                 return 1;
 319         }
 320         if (var->yres - 1 > VACTIVE_MASK) {
 321                 WRN_MSG("Y resolution too large (%d vs %d).\n",
 322                         var->yres, VACTIVE_MASK + 1);
 323                 return 1;
 324         }
 325
 326         /* Check for interlaced/doublescan modes. */
 327         if (var->vmode & FB_VMODE_INTERLACED) {
 328                 WRN_MSG("Mode is interlaced.\n");
 329                 return 1;
 330         }
 331         if (var->vmode & FB_VMODE_DOUBLE) {
 332                 WRN_MSG("Mode is double-scan.\n");
 333                 return 1;
 334         }
 335
 336         /* Check if clock is OK. */
 337         tmp = 1000000000 / var->pixclock;
 338         if (tmp < MIN_CLOCK) {
 339                 WRN_MSG("Pixel clock is too low (%d MHz vs %d MHz).\n",
 340                         (tmp + 500) / 1000, MIN_CLOCK / 1000);
 341                 return 1;
 342         }
 343         if (tmp > MAX_CLOCK) {
 344                 WRN_MSG("Pixel clock is too high (%d MHz vs %d MHz).\n",
 345                         (tmp + 500) / 1000, MAX_CLOCK / 1000);
 346                 return 1;
 347         }
 348
 349         return 0;
 350 }
 351
 352 int
 353 intelfbhw_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 354 {
 355         struct intelfb_info *dinfo = GET_DINFO(info);
 356         u32 offset, xoffset, yoffset;
 357
 358 #if VERBOSE > 0
 359         DBG_MSG("intelfbhw_pan_display\n");
 360 #endif
 361
 362         xoffset = ROUND_DOWN_TO(var->xoffset, 8);
 363         yoffset = var->yoffset;
 364
 365         if ((xoffset + var->xres > var->xres_virtual) ||
 366             (yoffset + var->yres > var->yres_virtual))
 367                 return -EINVAL;
 368
 369         offset = (yoffset * dinfo->pitch) +
 370                  (xoffset * var->bits_per_pixel) / 8;
 371
 372         offset += dinfo->fb.offset << 12;
 373
 374         dinfo->vsync.pan_offset = offset;
 375         if ((var->activate & FB_ACTIVATE_VBL) && !intelfbhw_enable_irq(dinfo, 0)) {
 376                 dinfo->vsync.pan_display = 1;
 377         } else {
 378                 dinfo->vsync.pan_display = 0;
 379                 OUTREG(DSPABASE, offset);
 380         }
 381
 382         return 0;
 383 }
 384
 385 /* Blank the screen. */
 386 void
 387 intelfbhw_do_blank(int blank, struct fb_info *info)
 388 {
 389         struct intelfb_info *dinfo = GET_DINFO(info);
 390         u32 tmp;
 391
 392 #if VERBOSE > 0
 393         DBG_MSG("intelfbhw_do_blank: blank is %d\n", blank);
 394 #endif
 395
 396         /* Turn plane A on or off */
 397         tmp = INREG(DSPACNTR);
 398         if (blank)
 399                 tmp &= ~DISPPLANE_PLANE_ENABLE;
 400         else
 401                 tmp |= DISPPLANE_PLANE_ENABLE;
 402         OUTREG(DSPACNTR, tmp);
 403         /* Flush */
 404         tmp = INREG(DSPABASE);
 405         OUTREG(DSPABASE, tmp);
 406
 407         /* Turn off/on the HW cursor */
 408 #if VERBOSE > 0
 409         DBG_MSG("cursor_on is %d\n", dinfo->cursor_on);
 410 #endif
 411         if (dinfo->cursor_on) {
 412                 if (blank) {
 413                         intelfbhw_cursor_hide(dinfo);
 414                 } else {
 415                         intelfbhw_cursor_show(dinfo);
 416                 }
 417                 dinfo->cursor_on = 1;
 418         }
 419         dinfo->cursor_blanked = blank;
 420
 421         /* Set DPMS level */
 422         tmp = INREG(ADPA) & ~ADPA_DPMS_CONTROL_MASK;
 423         switch (blank) {
 424         case FB_BLANK_UNBLANK:
 425         case FB_BLANK_NORMAL:
 426                 tmp |= ADPA_DPMS_D0;
 427                 break;
 428         case FB_BLANK_VSYNC_SUSPEND:
 429                 tmp |= ADPA_DPMS_D1;
 430                 break;
 431         case FB_BLANK_HSYNC_SUSPEND:
 432                 tmp |= ADPA_DPMS_D2;
 433                 break;
 434         case FB_BLANK_POWERDOWN:
 435                 tmp |= ADPA_DPMS_D3;
 436                 break;
 437         }
 438         OUTREG(ADPA, tmp);
 439
 440         return;
 441 }
 442
 443
 444 void
 445 intelfbhw_setcolreg(struct intelfb_info *dinfo, unsigned regno,
 446                     unsigned red, unsigned green, unsigned blue,
 447                     unsigned transp)
 448 {
 449 #if VERBOSE > 0
 450         DBG_MSG("intelfbhw_setcolreg: %d: (%d, %d, %d)\n",
 451                 regno, red, green, blue);
 452 #endif
 453
 454         u32 palette_reg = (dinfo->pipe == PIPE_A) ?
 455                           PALETTE_A : PALETTE_B;
 456
 457         OUTREG(palette_reg + (regno << 2),
 458                (red << PALETTE_8_RED_SHIFT) |
 459                (green << PALETTE_8_GREEN_SHIFT) |
 460                (blue << PALETTE_8_BLUE_SHIFT));
 461 }
 462
 463
 464 int
 465 intelfbhw_read_hw_state(struct intelfb_info *dinfo, struct intelfb_hwstate *hw,
 466                         int flag)
 467 {
 468         int i;
 469
 470 #if VERBOSE > 0
 471         DBG_MSG("intelfbhw_read_hw_state\n");
 472 #endif
 473
 474         if (!hw || !dinfo)
 475                 return -1;
 476
 477         /* Read in as much of the HW state as possible. */
 478         hw->vga0_divisor = INREG(VGA0_DIVISOR);
 479         hw->vga1_divisor = INREG(VGA1_DIVISOR);
 480         hw->vga_pd = INREG(VGAPD);
 481         hw->dpll_a = INREG(DPLL_A);
 482         hw->dpll_b = INREG(DPLL_B);
 483         hw->fpa0 = INREG(FPA0);
 484         hw->fpa1 = INREG(FPA1);
 485         hw->fpb0 = INREG(FPB0);
 486         hw->fpb1 = INREG(FPB1);
 487
 488         if (flag == 1)
 489                 return flag;
 490
 491 #if 0
 492         /* This seems to be a problem with the 852GM/855GM */
 493         for (i = 0; i < PALETTE_8_ENTRIES; i++) {
 494                 hw->palette_a[i] = INREG(PALETTE_A + (i << 2));
 495                 hw->palette_b[i] = INREG(PALETTE_B + (i << 2));
 496         }
 497 #endif
 498
 499         if (flag == 2)
 500                 return flag;
 501
 502         hw->htotal_a = INREG(HTOTAL_A);
 503         hw->hblank_a = INREG(HBLANK_A);
 504         hw->hsync_a = INREG(HSYNC_A);
 505         hw->vtotal_a = INREG(VTOTAL_A);
 506         hw->vblank_a = INREG(VBLANK_A);
 507         hw->vsync_a = INREG(VSYNC_A);
 508         hw->src_size_a = INREG(SRC_SIZE_A);
 509         hw->bclrpat_a = INREG(BCLRPAT_A);
 510         hw->htotal_b = INREG(HTOTAL_B);
 511         hw->hblank_b = INREG(HBLANK_B);
 512         hw->hsync_b = INREG(HSYNC_B);
 513         hw->vtotal_b = INREG(VTOTAL_B);
 514         hw->vblank_b = INREG(VBLANK_B);
 515         hw->vsync_b = INREG(VSYNC_B);
 516         hw->src_size_b = INREG(SRC_SIZE_B);
 517         hw->bclrpat_b = INREG(BCLRPAT_B);
 518
 519         if (flag == 3)
 520                 return flag;
 521
 522         hw->adpa = INREG(ADPA);
 523         hw->dvoa = INREG(DVOA);
 524         hw->dvob = INREG(DVOB);
 525         hw->dvoc = INREG(DVOC);
 526         hw->dvoa_srcdim = INREG(DVOA_SRCDIM);
 527         hw->dvob_srcdim = INREG(DVOB_SRCDIM);
 528         hw->dvoc_srcdim = INREG(DVOC_SRCDIM);
 529         hw->lvds = INREG(LVDS);
 530
 531         if (flag == 4)
 532                 return flag;
 533
 534         hw->pipe_a_conf = INREG(PIPEACONF);
 535         hw->pipe_b_conf = INREG(PIPEBCONF);
 536         hw->disp_arb = INREG(DISPARB);
 537
 538         if (flag == 5)
 539                 return flag;
 540
 541         hw->cursor_a_control = INREG(CURSOR_A_CONTROL);
 542         hw->cursor_b_control = INREG(CURSOR_B_CONTROL);
 543         hw->cursor_a_base = INREG(CURSOR_A_BASEADDR);
 544         hw->cursor_b_base = INREG(CURSOR_B_BASEADDR);
 545
 546         if (flag == 6)
 547                 return flag;
 548
 549         for (i = 0; i < 4; i++) {
 550                 hw->cursor_a_palette[i] = INREG(CURSOR_A_PALETTE0 + (i << 2));
 551                 hw->cursor_b_palette[i] = INREG(CURSOR_B_PALETTE0 + (i << 2));
 552         }
 553
 554         if (flag == 7)
 555                 return flag;
 556
 557         hw->cursor_size = INREG(CURSOR_SIZE);
 558
 559         if (flag == 8)
 560                 return flag;
 561
 562         hw->disp_a_ctrl = INREG(DSPACNTR);
 563         hw->disp_b_ctrl = INREG(DSPBCNTR);
 564         hw->disp_a_base = INREG(DSPABASE);
 565         hw->disp_b_base = INREG(DSPBBASE);
 566         hw->disp_a_stride = INREG(DSPASTRIDE);
 567         hw->disp_b_stride = INREG(DSPBSTRIDE);
 568
 569         if (flag == 9)
 570                 return flag;
 571
 572         hw->vgacntrl = INREG(VGACNTRL);
 573
 574         if (flag == 10)
 575                 return flag;
 576
 577         hw->add_id = INREG(ADD_ID);
 578
 579         if (flag == 11)
 580                 return flag;
 581
 582         for (i = 0; i < 7; i++) {
 583                 hw->swf0x[i] = INREG(SWF00 + (i << 2));
 584                 hw->swf1x[i] = INREG(SWF10 + (i << 2));
 585                 if (i < 3)
 586                         hw->swf3x[i] = INREG(SWF30 + (i << 2));
 587         }
 588
 589         for (i = 0; i < 8; i++)
 590                 hw->fence[i] = INREG(FENCE + (i << 2));
 591
 592         hw->instpm = INREG(INSTPM);
 593         hw->mem_mode = INREG(MEM_MODE);
 594         hw->fw_blc_0 = INREG(FW_BLC_0);
 595         hw->fw_blc_1 = INREG(FW_BLC_1);
 596
 597         hw->hwstam = INREG16(HWSTAM);
 598         hw->ier = INREG16(IER);
 599         hw->iir = INREG16(IIR);
 600         hw->imr = INREG16(IMR);
 601
 602         return 0;
 603 }
 604
 605
 606 static int calc_vclock3(int index, int m, int n, int p)
 607 {
 608         if (p == 0 || n == 0)
 609                 return 0;
 610         return plls[index].ref_clk * m / n / p;
 611 }
 612
 613 static int calc_vclock(int index, int m1, int m2, int n, int p1, int p2, int lvds)
 614 {
 615         struct pll_min_max *pll = &plls[index];
 616         u32 m, vco, p;
 617
 618         m = (5 * (m1 + 2)) + (m2 + 2);
 619         n += 2;
 620         vco = pll->ref_clk * m / n;
 621
 622         if (index == PLLS_I8xx) {
 623                 p = ((p1 + 2) * (1 << (p2 + 1)));
 624         } else {
 625                 p = ((p1) * (p2 ? 5 : 10));
 626         }
 627         return vco / p;
 628 }
 629
 630 static void
 631 intelfbhw_get_p1p2(struct intelfb_info *dinfo, int dpll, int *o_p1, int *o_p2)
 632 {
 633         int p1, p2;
 634
 635         if (IS_I9XX(dinfo)) {
 636                 if (dpll & DPLL_P1_FORCE_DIV2)
 637                         p1 = 1;
 638                 else
 639                         p1 = (dpll >> DPLL_P1_SHIFT) & 0xff;
 640
 641                 p1 = ffs(p1);
 642
 643                 p2 = (dpll >> DPLL_I9XX_P2_SHIFT) & DPLL_P2_MASK;
 644         } else {
 645                 if (dpll & DPLL_P1_FORCE_DIV2)
 646                         p1 = 0;
 647                 else
 648                         p1 = (dpll >> DPLL_P1_SHIFT) & DPLL_P1_MASK;
 649                 p2 = (dpll >> DPLL_P2_SHIFT) & DPLL_P2_MASK;
 650         }
 651
 652         *o_p1 = p1;
 653         *o_p2 = p2;
 654 }
 655
 656
 657 void
 658 intelfbhw_print_hw_state(struct intelfb_info *dinfo, struct intelfb_hwstate *hw)
 659 {
 660 #if REGDUMP
 661         int i, m1, m2, n, p1, p2;
 662         int index = dinfo->pll_index;
 663         DBG_MSG("intelfbhw_print_hw_state\n");
 664
 665         if (!hw || !dinfo)
 666                 return;
 667         /* Read in as much of the HW state as possible. */
 668         printk("hw state dump start\n");
 669         printk("        VGA0_DIVISOR:           0x%08x\n", hw->vga0_divisor);
 670         printk("        VGA1_DIVISOR:           0x%08x\n", hw->vga1_divisor);
 671         printk("        VGAPD:                  0x%08x\n", hw->vga_pd);
 672         n = (hw->vga0_divisor >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 673         m1 = (hw->vga0_divisor >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 674         m2 = (hw->vga0_divisor >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 675
 676         intelfbhw_get_p1p2(dinfo, hw->vga_pd, &p1, &p2);
 677
 678         printk("        VGA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
 679                m1, m2, n, p1, p2);
 680         printk("        VGA0: clock is %d\n",
 681                calc_vclock(index, m1, m2, n, p1, p2, 0));
 682
 683         n = (hw->vga1_divisor >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 684         m1 = (hw->vga1_divisor >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 685         m2 = (hw->vga1_divisor >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 686
 687         intelfbhw_get_p1p2(dinfo, hw->vga_pd, &p1, &p2);
 688         printk("        VGA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
 689                m1, m2, n, p1, p2);
 690         printk("        VGA1: clock is %d\n", calc_vclock(index, m1, m2, n, p1, p2, 0));
 691
 692         printk("        DPLL_A:                 0x%08x\n", hw->dpll_a);
 693         printk("        DPLL_B:                 0x%08x\n", hw->dpll_b);
 694         printk("        FPA0:                   0x%08x\n", hw->fpa0);
 695         printk("        FPA1:                   0x%08x\n", hw->fpa1);
 696         printk("        FPB0:                   0x%08x\n", hw->fpb0);
 697         printk("        FPB1:                   0x%08x\n", hw->fpb1);
 698
 699         n = (hw->fpa0 >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 700         m1 = (hw->fpa0 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 701         m2 = (hw->fpa0 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 702
 703         intelfbhw_get_p1p2(dinfo, hw->dpll_a, &p1, &p2);
 704
 705         printk("        PLLA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
 706                m1, m2, n, p1, p2);
 707         printk("        PLLA0: clock is %d\n", calc_vclock(index, m1, m2, n, p1, p2, 0));
 708
 709         n = (hw->fpa1 >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 710         m1 = (hw->fpa1 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 711         m2 = (hw->fpa1 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 712
 713         intelfbhw_get_p1p2(dinfo, hw->dpll_a, &p1, &p2);
 714
 715         printk("        PLLA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
 716                m1, m2, n, p1, p2);
 717         printk("        PLLA1: clock is %d\n", calc_vclock(index, m1, m2, n, p1, p2, 0));
 718
 719 #if 0
 720         printk("        PALETTE_A:\n");
 721         for (i = 0; i < PALETTE_8_ENTRIES)
 722                 printk("        %3d:    0x%08x\n", i, hw->palette_a[i]);
 723         printk("        PALETTE_B:\n");
 724         for (i = 0; i < PALETTE_8_ENTRIES)
 725                 printk("        %3d:    0x%08x\n", i, hw->palette_b[i]);
 726 #endif
 727
 728         printk("        HTOTAL_A:               0x%08x\n", hw->htotal_a);
 729         printk("        HBLANK_A:               0x%08x\n", hw->hblank_a);
 730         printk("        HSYNC_A:                0x%08x\n", hw->hsync_a);
 731         printk("        VTOTAL_A:               0x%08x\n", hw->vtotal_a);
 732         printk("        VBLANK_A:               0x%08x\n", hw->vblank_a);
 733         printk("        VSYNC_A:                0x%08x\n", hw->vsync_a);
 734         printk("        SRC_SIZE_A:             0x%08x\n", hw->src_size_a);
 735         printk("        BCLRPAT_A:              0x%08x\n", hw->bclrpat_a);
 736         printk("        HTOTAL_B:               0x%08x\n", hw->htotal_b);
 737         printk("        HBLANK_B:               0x%08x\n", hw->hblank_b);
 738         printk("        HSYNC_B:                0x%08x\n", hw->hsync_b);
 739         printk("        VTOTAL_B:               0x%08x\n", hw->vtotal_b);
 740         printk("        VBLANK_B:               0x%08x\n", hw->vblank_b);
 741         printk("        VSYNC_B:                0x%08x\n", hw->vsync_b);
 742         printk("        SRC_SIZE_B:             0x%08x\n", hw->src_size_b);
 743         printk("        BCLRPAT_B:              0x%08x\n", hw->bclrpat_b);
 744
 745         printk("        ADPA:                   0x%08x\n", hw->adpa);
 746         printk("        DVOA:                   0x%08x\n", hw->dvoa);
 747         printk("        DVOB:                   0x%08x\n", hw->dvob);
 748         printk("        DVOC:                   0x%08x\n", hw->dvoc);
 749         printk("        DVOA_SRCDIM:            0x%08x\n", hw->dvoa_srcdim);
 750         printk("        DVOB_SRCDIM:            0x%08x\n", hw->dvob_srcdim);
 751         printk("        DVOC_SRCDIM:            0x%08x\n", hw->dvoc_srcdim);
 752         printk("        LVDS:                   0x%08x\n", hw->lvds);
 753
 754         printk("        PIPEACONF:              0x%08x\n", hw->pipe_a_conf);
 755         printk("        PIPEBCONF:              0x%08x\n", hw->pipe_b_conf);
 756         printk("        DISPARB:                0x%08x\n", hw->disp_arb);
 757
 758         printk("        CURSOR_A_CONTROL:       0x%08x\n", hw->cursor_a_control);
 759         printk("        CURSOR_B_CONTROL:       0x%08x\n", hw->cursor_b_control);
 760         printk("        CURSOR_A_BASEADDR:      0x%08x\n", hw->cursor_a_base);
 761         printk("        CURSOR_B_BASEADDR:      0x%08x\n", hw->cursor_b_base);
 762
 763         printk("        CURSOR_A_PALETTE:       ");
 764         for (i = 0; i < 4; i++) {
 765                 printk("0x%08x", hw->cursor_a_palette[i]);
 766                 if (i < 3)
 767                         printk(", ");
 768         }
 769         printk("\n");
 770         printk("        CURSOR_B_PALETTE:       ");
 771         for (i = 0; i < 4; i++) {
 772                 printk("0x%08x", hw->cursor_b_palette[i]);
 773                 if (i < 3)
 774                         printk(", ");
 775         }
 776         printk("\n");
 777
 778         printk("        CURSOR_SIZE:            0x%08x\n", hw->cursor_size);
 779
 780         printk("        DSPACNTR:               0x%08x\n", hw->disp_a_ctrl);
 781         printk("        DSPBCNTR:               0x%08x\n", hw->disp_b_ctrl);
 782         printk("        DSPABASE:               0x%08x\n", hw->disp_a_base);
 783         printk("        DSPBBASE:               0x%08x\n", hw->disp_b_base);
 784         printk("        DSPASTRIDE:             0x%08x\n", hw->disp_a_stride);
 785         printk("        DSPBSTRIDE:             0x%08x\n", hw->disp_b_stride);
 786
 787         printk("        VGACNTRL:               0x%08x\n", hw->vgacntrl);
 788         printk("        ADD_ID:                 0x%08x\n", hw->add_id);
 789
 790         for (i = 0; i < 7; i++) {
 791                 printk("        SWF0%d                  0x%08x\n", i,
 792                         hw->swf0x[i]);
 793         }
 794         for (i = 0; i < 7; i++) {
 795                 printk("        SWF1%d                  0x%08x\n", i,
 796                         hw->swf1x[i]);
 797         }
 798         for (i = 0; i < 3; i++) {
 799                 printk("        SWF3%d                  0x%08x\n", i,
 800                        hw->swf3x[i]);
 801         }
 802         for (i = 0; i < 8; i++)
 803                 printk("        FENCE%d                 0x%08x\n", i,
 804                        hw->fence[i]);
 805
 806         printk("        INSTPM                  0x%08x\n", hw->instpm);
 807         printk("        MEM_MODE                0x%08x\n", hw->mem_mode);
 808         printk("        FW_BLC_0                0x%08x\n", hw->fw_blc_0);
 809         printk("        FW_BLC_1                0x%08x\n", hw->fw_blc_1);
 810
 811         printk("        HWSTAM                  0x%04x\n", hw->hwstam);
 812         printk("        IER                     0x%04x\n", hw->ier);
 813         printk("        IIR                     0x%04x\n", hw->iir);
 814         printk("        IMR                     0x%04x\n", hw->imr);
 815         printk("hw state dump end\n");
 816 #endif
 817 }
 818
 819
 820
 821 /* Split the M parameter into M1 and M2. */
 822 static int
 823 splitm(int index, unsigned int m, unsigned int *retm1, unsigned int *retm2)
 824 {
 825         int m1, m2;
 826         int testm;
 827         struct pll_min_max *pll = &plls[index];
 828
 829         /* no point optimising too much - brute force m */
 830         for (m1 = pll->min_m1; m1 < pll->max_m1 + 1; m1++) {
 831                 for (m2 = pll->min_m2; m2 < pll->max_m2 + 1; m2++) {
 832                         testm = (5 * (m1 + 2)) + (m2 + 2);
 833                         if (testm == m) {
 834                                 *retm1 = (unsigned int)m1;
 835                                 *retm2 = (unsigned int)m2;
 836                                 return 0;
 837                         }
 838                 }
 839         }
 840         return 1;
 841 }
 842
 843 /* Split the P parameter into P1 and P2. */
 844 static int
 845 splitp(int index, unsigned int p, unsigned int *retp1, unsigned int *retp2)
 846 {
 847         int p1, p2;
 848         struct pll_min_max *pll = &plls[index];
 849
 850         if (index == PLLS_I9xx) {
 851                 p2 = (p % 10) ? 1 : 0;
 852
 853                 p1 = p / (p2 ? 5 : 10);
 854
 855                 *retp1 = (unsigned int)p1;
 856                 *retp2 = (unsigned int)p2;
 857                 return 0;
 858         }
 859
 860         if (p % 4 == 0)
 861                 p2 = 1;
 862         else
 863                 p2 = 0;
 864         p1 = (p / (1 << (p2 + 1))) - 2;
 865         if (p % 4 == 0 && p1 < pll->min_p1) {
 866                 p2 = 0;
 867                 p1 = (p / (1 << (p2 + 1))) - 2;
 868         }
 869         if (p1 < pll->min_p1 || p1 > pll->max_p1 ||
 870             (p1 + 2) * (1 << (p2 + 1)) != p) {
 871                 return 1;
 872         } else {
 873                 *retp1 = (unsigned int)p1;
 874                 *retp2 = (unsigned int)p2;
 875                 return 0;
 876         }
 877 }
 878
 879 static int
 880 calc_pll_params(int index, int clock, u32 *retm1, u32 *retm2, u32 *retn, u32 *retp1,
 881                 u32 *retp2, u32 *retclock)
 882 {
 883         u32 m1, m2, n, p1, p2, n1, testm;
 884         u32 f_vco, p, p_best = 0, m, f_out = 0;
 885         u32 err_max, err_target, err_best = 10000000;
 886         u32 n_best = 0, m_best = 0, f_best, f_err;
 887         u32 p_min, p_max, p_inc, div_max;
 888         struct pll_min_max *pll = &plls[index];
 889
 890         /* Accept 0.5% difference, but aim for 0.1% */
 891         err_max = 5 * clock / 1000;
 892         err_target = clock / 1000;
 893
 894         DBG_MSG("Clock is %d\n", clock);
 895
 896         div_max = pll->max_vco / clock;
 897
 898         p_inc = (clock <= pll->p_transition_clk) ? pll->p_inc_lo : pll->p_inc_hi;
 899         p_min = p_inc;
 900         p_max = ROUND_DOWN_TO(div_max, p_inc);
 901         if (p_min < pll->min_p)
 902                 p_min = pll->min_p;
 903         if (p_max > pll->max_p)
 904                 p_max = pll->max_p;
 905
 906         DBG_MSG("p range is %d-%d (%d)\n", p_min, p_max, p_inc);
 907
 908         p = p_min;
 909         do {
 910                 if (splitp(index, p, &p1, &p2)) {
 911                         WRN_MSG("cannot split p = %d\n", p);
 912                         p += p_inc;
 913                         continue;
 914                 }
 915                 n = pll->min_n;
 916                 f_vco = clock * p;
 917
 918                 do {
 919                         m = ROUND_UP_TO(f_vco * n, pll->ref_clk) / pll->ref_clk;
 920                         if (m < pll->min_m)
 921                                 m = pll->min_m + 1;
 922                         if (m > pll->max_m)
 923                                 m = pll->max_m - 1;
 924                         for (testm = m - 1; testm <= m; testm++) {
 925                                 f_out = calc_vclock3(index, m, n, p);
 926                                 if (splitm(index, testm, &m1, &m2)) {
 927                                         WRN_MSG("cannot split m = %d\n", m);
 928                                         n++;
 929                                         continue;
 930                                 }
 931                                 if (clock > f_out)
 932                                         f_err = clock - f_out;
 933                                 else/* slightly bias the error for bigger clocks */
 934                                         f_err = f_out - clock + 1;
 935
 936                                 if (f_err < err_best) {
 937                                         m_best = testm;
 938                                         n_best = n;
 939                                         p_best = p;
 940                                         f_best = f_out;
 941                                         err_best = f_err;
 942                                 }
 943                         }
 944                         n++;
 945                 } while ((n <= pll->max_n) && (f_out >= clock));
 946                 p += p_inc;
 947         } while ((p <= p_max));
 948
 949         if (!m_best) {
 950                 WRN_MSG("cannot find parameters for clock %d\n", clock);
 951                 return 1;
 952         }
 953         m = m_best;
 954         n = n_best;
 955         p = p_best;
 956         splitm(index, m, &m1, &m2);
 957         splitp(index, p, &p1, &p2);
 958         n1 = n - 2;
 959
 960         DBG_MSG("m, n, p: %d (%d,%d), %d (%d), %d (%d,%d), "
 961                 "f: %d (%d), VCO: %d\n",
 962                 m, m1, m2, n, n1, p, p1, p2,
 963                 calc_vclock3(index, m, n, p),
 964                 calc_vclock(index, m1, m2, n1, p1, p2, 0),
 965                 calc_vclock3(index, m, n, p) * p);
 966         *retm1 = m1;
 967         *retm2 = m2;
 968         *retn = n1;
 969         *retp1 = p1;
 970         *retp2 = p2;
 971         *retclock = calc_vclock(index, m1, m2, n1, p1, p2, 0);
 972
 973         return 0;
 974 }
 975
 976 static __inline__ int
 977 check_overflow(u32 value, u32 limit, const char *description)
 978 {
 979         if (value > limit) {
 980                 WRN_MSG("%s value %d exceeds limit %d\n",
 981                         description, value, limit);
 982                 return 1;
 983         }
 984         return 0;
 985 }
 986
 987 /* It is assumed that hw is filled in with the initial state information. */
 988 int
 989 intelfbhw_mode_to_hw(struct intelfb_info *dinfo, struct intelfb_hwstate *hw,
 990                      struct fb_var_screeninfo *var)
 991 {
 992         int pipe = PIPE_A;
 993         u32 *dpll, *fp0, *fp1;
 994         u32 m1, m2, n, p1, p2, clock_target, clock;
 995         u32 hsync_start, hsync_end, hblank_start, hblank_end, htotal, hactive;
 996         u32 vsync_start, vsync_end, vblank_start, vblank_end, vtotal, vactive;
 997         u32 vsync_pol, hsync_pol;
 998         u32 *vs, *vb, *vt, *hs, *hb, *ht, *ss, *pipe_conf;
 999         u32 stride_alignment;
1000
1001         DBG_MSG("intelfbhw_mode_to_hw\n");
1002
1003         /* Disable VGA */
1004         hw->vgacntrl |= VGA_DISABLE;
1005
1006         /* Check whether pipe A or pipe B is enabled. */
1007         if (hw->pipe_a_conf & PIPECONF_ENABLE)
1008                 pipe = PIPE_A;
1009         else if (hw->pipe_b_conf & PIPECONF_ENABLE)
1010                 pipe = PIPE_B;
1011
1012         /* Set which pipe's registers will be set. */
1013         if (pipe == PIPE_B) {
1014                 dpll = &hw->dpll_b;
1015                 fp0 = &hw->fpb0;
1016                 fp1 = &hw->fpb1;
1017                 hs = &hw->hsync_b;
1018                 hb = &hw->hblank_b;
1019                 ht = &hw->htotal_b;
1020                 vs = &hw->vsync_b;
1021                 vb = &hw->vblank_b;
1022                 vt = &hw->vtotal_b;
1023                 ss = &hw->src_size_b;
1024                 pipe_conf = &hw->pipe_b_conf;
1025         } else {
1026                 dpll = &hw->dpll_a;
1027                 fp0 = &hw->fpa0;
1028                 fp1 = &hw->fpa1;
1029                 hs = &hw->hsync_a;
1030                 hb = &hw->hblank_a;
1031                 ht = &hw->htotal_a;
1032                 vs = &hw->vsync_a;
1033                 vb = &hw->vblank_a;
1034                 vt = &hw->vtotal_a;
1035                 ss = &hw->src_size_a;
1036                 pipe_conf = &hw->pipe_a_conf;
1037         }
1038
1039         /* Use ADPA register for sync control. */
1040         hw->adpa &= ~ADPA_USE_VGA_HVPOLARITY;
1041
1042         /* sync polarity */
1043         hsync_pol = (var->sync & FB_SYNC_HOR_HIGH_ACT) ?
1044                         ADPA_SYNC_ACTIVE_HIGH : ADPA_SYNC_ACTIVE_LOW;
1045         vsync_pol = (var->sync & FB_SYNC_VERT_HIGH_ACT) ?
1046                         ADPA_SYNC_ACTIVE_HIGH : ADPA_SYNC_ACTIVE_LOW;
1047         hw->adpa &= ~((ADPA_SYNC_ACTIVE_MASK << ADPA_VSYNC_ACTIVE_SHIFT) |
1048                       (ADPA_SYNC_ACTIVE_MASK << ADPA_HSYNC_ACTIVE_SHIFT));
1049         hw->adpa |= (hsync_pol << ADPA_HSYNC_ACTIVE_SHIFT) |
1050                     (vsync_pol << ADPA_VSYNC_ACTIVE_SHIFT);
1051
1052         /* Connect correct pipe to the analog port DAC */
1053         hw->adpa &= ~(PIPE_MASK << ADPA_PIPE_SELECT_SHIFT);
1054         hw->adpa |= (pipe << ADPA_PIPE_SELECT_SHIFT);
1055
1056         /* Set DPMS state to D0 (on) */
1057         hw->adpa &= ~ADPA_DPMS_CONTROL_MASK;
1058         hw->adpa |= ADPA_DPMS_D0;
1059
1060         hw->adpa |= ADPA_DAC_ENABLE;
1061
1062         *dpll |= (DPLL_VCO_ENABLE | DPLL_VGA_MODE_DISABLE);
1063         *dpll &= ~(DPLL_RATE_SELECT_MASK | DPLL_REFERENCE_SELECT_MASK);
1064         *dpll |= (DPLL_REFERENCE_DEFAULT | DPLL_RATE_SELECT_FP0);
1065
1066         /* Desired clock in kHz */
1067         clock_target = 1000000000 / var->pixclock;
1068
1069         if (calc_pll_params(dinfo->pll_index, clock_target, &m1, &m2,
1070                             &n, &p1, &p2, &clock)) {
1071                 WRN_MSG("calc_pll_params failed\n");
1072                 return 1;
1073         }
1074
1075         /* Check for overflow. */
1076         if (check_overflow(p1, DPLL_P1_MASK, "PLL P1 parameter"))
1077                 return 1;
1078         if (check_overflow(p2, DPLL_P2_MASK, "PLL P2 parameter"))
1079                 return 1;
1080         if (check_overflow(m1, FP_DIVISOR_MASK, "PLL M1 parameter"))
1081                 return 1;
1082         if (check_overflow(m2, FP_DIVISOR_MASK, "PLL M2 parameter"))
1083                 return 1;
1084         if (check_overflow(n, FP_DIVISOR_MASK, "PLL N parameter"))
1085                 return 1;
1086
1087         *dpll &= ~DPLL_P1_FORCE_DIV2;
1088         *dpll &= ~((DPLL_P2_MASK << DPLL_P2_SHIFT) |
1089                    (DPLL_P1_MASK << DPLL_P1_SHIFT));
1090
1091         if (IS_I9XX(dinfo)) {
1092                 *dpll |= (p2 << DPLL_I9XX_P2_SHIFT);
1093                 *dpll |= (1 << (p1 - 1)) << DPLL_P1_SHIFT;
1094         } else {
1095                 *dpll |= (p2 << DPLL_P2_SHIFT) | (p1 << DPLL_P1_SHIFT);
1096         }
1097
1098         *fp0 = (n << FP_N_DIVISOR_SHIFT) |
1099                (m1 << FP_M1_DIVISOR_SHIFT) |
1100                (m2 << FP_M2_DIVISOR_SHIFT);
1101         *fp1 = *fp0;
1102
1103         hw->dvob &= ~PORT_ENABLE;
1104         hw->dvoc &= ~PORT_ENABLE;
1105
1106         /* Use display plane A. */
1107         hw->disp_a_ctrl |= DISPPLANE_PLANE_ENABLE;
1108         hw->disp_a_ctrl &= ~DISPPLANE_GAMMA_ENABLE;
1109         hw->disp_a_ctrl &= ~DISPPLANE_PIXFORMAT_MASK;
1110         switch (intelfb_var_to_depth(var)) {
1111         case 8:
1112                 hw->disp_a_ctrl |= DISPPLANE_8BPP | DISPPLANE_GAMMA_ENABLE;
1113                 break;
1114         case 15:
1115                 hw->disp_a_ctrl |= DISPPLANE_15_16BPP;
1116                 break;
1117         case 16:
1118                 hw->disp_a_ctrl |= DISPPLANE_16BPP;
1119                 break;
1120         case 24:
1121                 hw->disp_a_ctrl |= DISPPLANE_32BPP_NO_ALPHA;
1122                 break;
1123         }
1124         hw->disp_a_ctrl &= ~(PIPE_MASK << DISPPLANE_SEL_PIPE_SHIFT);
1125         hw->disp_a_ctrl |= (pipe << DISPPLANE_SEL_PIPE_SHIFT);
1126
1127         /* Set CRTC registers. */
1128         hactive = var->xres;
1129         hsync_start = hactive + var->right_margin;
1130         hsync_end = hsync_start + var->hsync_len;
1131         htotal = hsync_end + var->left_margin;
1132         hblank_start = hactive;
1133         hblank_end = htotal;
1134
1135         DBG_MSG("H: act %d, ss %d, se %d, tot %d bs %d, be %d\n",
1136                 hactive, hsync_start, hsync_end, htotal, hblank_start,
1137                 hblank_end);
1138
1139         vactive = var->yres;
1140         vsync_start = vactive + var->lower_margin;
1141         vsync_end = vsync_start + var->vsync_len;
1142         vtotal = vsync_end + var->upper_margin;
1143         vblank_start = vactive;
1144         vblank_end = vtotal;
1145         vblank_end = vsync_end + 1;
1146
1147         DBG_MSG("V: act %d, ss %d, se %d, tot %d bs %d, be %d\n",
1148                 vactive, vsync_start, vsync_end, vtotal, vblank_start,
1149                 vblank_end);
1150
1151         /* Adjust for register values, and check for overflow. */
1152         hactive--;
1153         if (check_overflow(hactive, HACTIVE_MASK, "CRTC hactive"))
1154                 return 1;
1155         hsync_start--;
1156         if (check_overflow(hsync_start, HSYNCSTART_MASK, "CRTC hsync_start"))
1157                 return 1;
1158         hsync_end--;
1159         if (check_overflow(hsync_end, HSYNCEND_MASK, "CRTC hsync_end"))
1160                 return 1;
1161         htotal--;
1162         if (check_overflow(htotal, HTOTAL_MASK, "CRTC htotal"))
1163                 return 1;
1164         hblank_start--;
1165         if (check_overflow(hblank_start, HBLANKSTART_MASK, "CRTC hblank_start"))
1166                 return 1;
1167         hblank_end--;
1168         if (check_overflow(hblank_end, HBLANKEND_MASK, "CRTC hblank_end"))
1169                 return 1;
1170
1171         vactive--;
1172         if (check_overflow(vactive, VACTIVE_MASK, "CRTC vactive"))
1173                 return 1;
1174         vsync_start--;
1175         if (check_overflow(vsync_start, VSYNCSTART_MASK, "CRTC vsync_start"))
1176                 return 1;
1177         vsync_end--;
1178         if (check_overflow(vsync_end, VSYNCEND_MASK, "CRTC vsync_end"))
1179                 return 1;
1180         vtotal--;
1181         if (check_overflow(vtotal, VTOTAL_MASK, "CRTC vtotal"))
1182                 return 1;
1183         vblank_start--;
1184         if (check_overflow(vblank_start, VBLANKSTART_MASK, "CRTC vblank_start"))
1185                 return 1;
1186         vblank_end--;
1187         if (check_overflow(vblank_end, VBLANKEND_MASK, "CRTC vblank_end"))
1188                 return 1;
1189
1190         *ht = (htotal << HTOTAL_SHIFT) | (hactive << HACTIVE_SHIFT);
1191         *hb = (hblank_start << HBLANKSTART_SHIFT) |
1192               (hblank_end << HSYNCEND_SHIFT);
1193         *hs = (hsync_start << HSYNCSTART_SHIFT) | (hsync_end << HSYNCEND_SHIFT);
1194
1195         *vt = (vtotal << VTOTAL_SHIFT) | (vactive << VACTIVE_SHIFT);
1196         *vb = (vblank_start << VBLANKSTART_SHIFT) |
1197               (vblank_end << VSYNCEND_SHIFT);
1198         *vs = (vsync_start << VSYNCSTART_SHIFT) | (vsync_end << VSYNCEND_SHIFT);
1199         *ss = (hactive << SRC_SIZE_HORIZ_SHIFT) |
1200               (vactive << SRC_SIZE_VERT_SHIFT);
1201
1202         hw->disp_a_stride = dinfo->pitch;
1203         DBG_MSG("pitch is %d\n", hw->disp_a_stride);
1204
1205         hw->disp_a_base = hw->disp_a_stride * var->yoffset +
1206                           var->xoffset * var->bits_per_pixel / 8;
1207
1208         hw->disp_a_base += dinfo->fb.offset << 12;
1209
1210         /* Check stride alignment. */
1211         stride_alignment = IS_I9XX(dinfo) ? STRIDE_ALIGNMENT_I9XX :
1212                                             STRIDE_ALIGNMENT;
1213         if (hw->disp_a_stride % stride_alignment != 0) {
1214                 WRN_MSG("display stride %d has bad alignment %d\n",
1215                         hw->disp_a_stride, stride_alignment);
1216                 return 1;
1217         }
1218
1219         /* Set the palette to 8-bit mode. */
1220         *pipe_conf &= ~PIPECONF_GAMMA;
1221         return 0;
1222 }
1223
1224 /* Program a (non-VGA) video mode. */
1225 int
1226 intelfbhw_program_mode(struct intelfb_info *dinfo,
1227                      const struct intelfb_hwstate *hw, int blank)
1228 {
1229         int pipe = PIPE_A;
1230         u32 tmp;
1231         const u32 *dpll, *fp0, *fp1, *pipe_conf;
1232         const u32 *hs, *ht, *hb, *vs, *vt, *vb, *ss;
1233         u32 dpll_reg, fp0_reg, fp1_reg, pipe_conf_reg;
1234         u32 hsync_reg, htotal_reg, hblank_reg;
1235         u32 vsync_reg, vtotal_reg, vblank_reg;
1236         u32 src_size_reg;
1237         u32 count, tmp_val[3];
1238
1239         /* Assume single pipe, display plane A, analog CRT. */
1240
1241 #if VERBOSE > 0
1242         DBG_MSG("intelfbhw_program_mode\n");
1243 #endif
1244
1245         /* Disable VGA */
1246         tmp = INREG(VGACNTRL);
1247         tmp |= VGA_DISABLE;
1248         OUTREG(VGACNTRL, tmp);
1249
1250         /* Check whether pipe A or pipe B is enabled. */
1251         if (hw->pipe_a_conf & PIPECONF_ENABLE)
1252                 pipe = PIPE_A;
1253         else if (hw->pipe_b_conf & PIPECONF_ENABLE)
1254                 pipe = PIPE_B;
1255
1256         dinfo->pipe = pipe;
1257
1258         if (pipe == PIPE_B) {
1259                 dpll = &hw->dpll_b;
1260                 fp0 = &hw->fpb0;
1261                 fp1 = &hw->fpb1;
1262                 pipe_conf = &hw->pipe_b_conf;
1263                 hs = &hw->hsync_b;
1264                 hb = &hw->hblank_b;
1265                 ht = &hw->htotal_b;
1266                 vs = &hw->vsync_b;
1267                 vb = &hw->vblank_b;
1268                 vt = &hw->vtotal_b;
1269                 ss = &hw->src_size_b;
1270                 dpll_reg = DPLL_B;
1271                 fp0_reg = FPB0;
1272                 fp1_reg = FPB1;
1273                 pipe_conf_reg = PIPEBCONF;
1274                 hsync_reg = HSYNC_B;
1275                 htotal_reg = HTOTAL_B;
1276                 hblank_reg = HBLANK_B;
1277                 vsync_reg = VSYNC_B;
1278                 vtotal_reg = VTOTAL_B;
1279                 vblank_reg = VBLANK_B;
1280                 src_size_reg = SRC_SIZE_B;
1281         } else {
1282                 dpll = &hw->dpll_a;
1283                 fp0 = &hw->fpa0;
1284                 fp1 = &hw->fpa1;
1285                 pipe_conf = &hw->pipe_a_conf;
1286                 hs = &hw->hsync_a;
1287                 hb = &hw->hblank_a;
1288                 ht = &hw->htotal_a;
1289                 vs = &hw->vsync_a;
1290                 vb = &hw->vblank_a;
1291                 vt = &hw->vtotal_a;
1292                 ss = &hw->src_size_a;
1293                 dpll_reg = DPLL_A;
1294                 fp0_reg = FPA0;
1295                 fp1_reg = FPA1;
1296                 pipe_conf_reg = PIPEACONF;
1297                 hsync_reg = HSYNC_A;
1298                 htotal_reg = HTOTAL_A;
1299                 hblank_reg = HBLANK_A;
1300                 vsync_reg = VSYNC_A;
1301                 vtotal_reg = VTOTAL_A;
1302                 vblank_reg = VBLANK_A;
1303                 src_size_reg = SRC_SIZE_A;
1304         }
1305
1306         /* turn off pipe */
1307         tmp = INREG(pipe_conf_reg);
1308         tmp &= ~PIPECONF_ENABLE;
1309         OUTREG(pipe_conf_reg, tmp);
1310
1311         count = 0;
1312         do {
1313                 tmp_val[count%3] = INREG(0x70000);
1314                 if ((tmp_val[0] == tmp_val[1]) && (tmp_val[1]==tmp_val[2]))
1315                         break;
1316                 count++;
1317                 udelay(1);
1318                 if (count % 200 == 0) {
1319                         tmp = INREG(pipe_conf_reg);
1320                         tmp &= ~PIPECONF_ENABLE;
1321                         OUTREG(pipe_conf_reg, tmp);
1322                 }
1323         } while(count < 2000);
1324
1325         OUTREG(ADPA, INREG(ADPA) & ~ADPA_DAC_ENABLE);
1326
1327         /* Disable planes A and B. */
1328         tmp = INREG(DSPACNTR);
1329         tmp &= ~DISPPLANE_PLANE_ENABLE;
1330         OUTREG(DSPACNTR, tmp);
1331         tmp = INREG(DSPBCNTR);
1332         tmp &= ~DISPPLANE_PLANE_ENABLE;
1333         OUTREG(DSPBCNTR, tmp);
1334
1335         /* Wait for vblank. For now, just wait for a 50Hz cycle (20ms)) */
1336         mdelay(20);
1337
1338         OUTREG(DVOB, INREG(DVOB) & ~PORT_ENABLE);
1339         OUTREG(DVOC, INREG(DVOC) & ~PORT_ENABLE);
1340         OUTREG(ADPA, INREG(ADPA) & ~ADPA_DAC_ENABLE);
1341
1342         /* Disable Sync */
1343         tmp = INREG(ADPA);
1344         tmp &= ~ADPA_DPMS_CONTROL_MASK;
1345         tmp |= ADPA_DPMS_D3;
1346         OUTREG(ADPA, tmp);
1347
1348         /* do some funky magic - xyzzy */
1349         OUTREG(0x61204, 0xabcd0000);
1350
1351         /* turn off PLL */
1352         tmp = INREG(dpll_reg);
1353         dpll_reg &= ~DPLL_VCO_ENABLE;
1354         OUTREG(dpll_reg, tmp);
1355
1356         /* Set PLL parameters */
1357         OUTREG(fp0_reg, *fp0);
1358         OUTREG(fp1_reg, *fp1);
1359
1360         /* Enable PLL */
1361         OUTREG(dpll_reg, *dpll);
1362
1363         /* Set DVOs B/C */
1364         OUTREG(DVOB, hw->dvob);
1365         OUTREG(DVOC, hw->dvoc);
1366
1367         /* undo funky magic */
1368         OUTREG(0x61204, 0x00000000);
1369
1370         /* Set ADPA */
1371         OUTREG(ADPA, INREG(ADPA) | ADPA_DAC_ENABLE);
1372         OUTREG(ADPA, (hw->adpa & ~(ADPA_DPMS_CONTROL_MASK)) | ADPA_DPMS_D3);
1373
1374         /* Set pipe parameters */
1375         OUTREG(hsync_reg, *hs);
1376         OUTREG(hblank_reg, *hb);
1377         OUTREG(htotal_reg, *ht);
1378         OUTREG(vsync_reg, *vs);
1379         OUTREG(vblank_reg, *vb);
1380         OUTREG(vtotal_reg, *vt);
1381         OUTREG(src_size_reg, *ss);
1382
1383         /* Enable pipe */
1384         OUTREG(pipe_conf_reg, *pipe_conf | PIPECONF_ENABLE);
1385
1386         /* Enable sync */
1387         tmp = INREG(ADPA);
1388         tmp &= ~ADPA_DPMS_CONTROL_MASK;
1389         tmp |= ADPA_DPMS_D0;
1390         OUTREG(ADPA, tmp);
1391
1392         /* setup display plane */
1393         if (dinfo->pdev->device == PCI_DEVICE_ID_INTEL_830M) {
1394                 /*
1395                  *      i830M errata: the display plane must be enabled
1396                  *      to allow writes to the other bits in the plane
1397                  *      control register.
1398                  */
1399                 tmp = INREG(DSPACNTR);
1400                 if ((tmp & DISPPLANE_PLANE_ENABLE) != DISPPLANE_PLANE_ENABLE) {
1401                         tmp |= DISPPLANE_PLANE_ENABLE;
1402                         OUTREG(DSPACNTR, tmp);
1403                         OUTREG(DSPACNTR,
1404                                hw->disp_a_ctrl|DISPPLANE_PLANE_ENABLE);
1405                         mdelay(1);
1406                 }
1407         }
1408
1409         OUTREG(DSPACNTR, hw->disp_a_ctrl & ~DISPPLANE_PLANE_ENABLE);
1410         OUTREG(DSPASTRIDE, hw->disp_a_stride);
1411         OUTREG(DSPABASE, hw->disp_a_base);
1412
1413         /* Enable plane */
1414         if (!blank) {
1415                 tmp = INREG(DSPACNTR);
1416                 tmp |= DISPPLANE_PLANE_ENABLE;
1417                 OUTREG(DSPACNTR, tmp);
1418                 OUTREG(DSPABASE, hw->disp_a_base);
1419         }
1420
1421         return 0;
1422 }
1423
1424 /* forward declarations */
1425 static void refresh_ring(struct intelfb_info *dinfo);
1426 static void reset_state(struct intelfb_info *dinfo);
1427 static void do_flush(struct intelfb_info *dinfo);
1428
1429 static int
1430 wait_ring(struct intelfb_info *dinfo, int n)
1431 {
1432         int i = 0;
1433         unsigned long end;
1434         u32 last_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
1435
1436 #if VERBOSE > 0
1437         DBG_MSG("wait_ring: %d\n", n);
1438 #endif
1439
1440         end = jiffies + (HZ * 3);
1441         while (dinfo->ring_space < n) {
1442                 dinfo->ring_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
1443                 if (dinfo->ring_tail + RING_MIN_FREE < dinfo->ring_head)
1444                         dinfo->ring_space = dinfo->ring_head
1445                                 - (dinfo->ring_tail + RING_MIN_FREE);
1446                 else
1447                         dinfo->ring_space = (dinfo->ring.size +
1448                                              dinfo->ring_head)
1449                                 - (dinfo->ring_tail + RING_MIN_FREE);
1450                 if (dinfo->ring_head != last_head) {
1451                         end = jiffies + (HZ * 3);
1452                         last_head = dinfo->ring_head;
1453                 }
1454                 i++;
1455                 if (time_before(end, jiffies)) {
1456                         if (!i) {
1457                                 /* Try again */
1458                                 reset_state(dinfo);
1459                                 refresh_ring(dinfo);
1460                                 do_flush(dinfo);
1461                                 end = jiffies + (HZ * 3);
1462                                 i = 1;
1463                         } else {
1464                                 WRN_MSG("ring buffer : space: %d wanted %d\n",
1465                                         dinfo->ring_space, n);
1466                                 WRN_MSG("lockup - turning off hardware "
1467                                         "acceleration\n");
1468                                 dinfo->ring_lockup = 1;
1469                                 break;
1470                         }
1471                 }
1472                 udelay(1);
1473         }
1474         return i;
1475 }
1476
1477 static void
1478 do_flush(struct intelfb_info *dinfo) {
1479         START_RING(2);
1480         OUT_RING(MI_FLUSH | MI_WRITE_DIRTY_STATE | MI_INVALIDATE_MAP_CACHE);
1481         OUT_RING(MI_NOOP);
1482         ADVANCE_RING();
1483 }
1484
1485 void
1486 intelfbhw_do_sync(struct intelfb_info *dinfo)
1487 {
1488 #if VERBOSE > 0
1489         DBG_MSG("intelfbhw_do_sync\n");
1490 #endif
1491
1492         if (!dinfo->accel)
1493                 return;
1494
1495         /*
1496          * Send a flush, then wait until the ring is empty.  This is what
1497          * the XFree86 driver does, and actually it doesn't seem a lot worse
1498          * than the recommended method (both have problems).
1499          */
1500         do_flush(dinfo);
1501         wait_ring(dinfo, dinfo->ring.size - RING_MIN_FREE);
1502         dinfo->ring_space = dinfo->ring.size - RING_MIN_FREE;
1503 }
1504
1505 static void
1506 refresh_ring(struct intelfb_info *dinfo)
1507 {
1508 #if VERBOSE > 0
1509         DBG_MSG("refresh_ring\n");
1510 #endif
1511
1512         dinfo->ring_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
1513         dinfo->ring_tail = INREG(PRI_RING_TAIL) & RING_TAIL_MASK;
1514         if (dinfo->ring_tail + RING_MIN_FREE < dinfo->ring_head)
1515                 dinfo->ring_space = dinfo->ring_head
1516                         - (dinfo->ring_tail + RING_MIN_FREE);
1517         else
1518                 dinfo->ring_space = (dinfo->ring.size + dinfo->ring_head)
1519                         - (dinfo->ring_tail + RING_MIN_FREE);
1520 }
1521
1522 static void
1523 reset_state(struct intelfb_info *dinfo)
1524 {
1525         int i;
1526         u32 tmp;
1527
1528 #if VERBOSE > 0
1529         DBG_MSG("reset_state\n");
1530 #endif
1531
1532         for (i = 0; i < FENCE_NUM; i++)
1533                 OUTREG(FENCE + (i << 2), 0);
1534
1535         /* Flush the ring buffer if it's enabled. */
1536         tmp = INREG(PRI_RING_LENGTH);
1537         if (tmp & RING_ENABLE) {
1538 #if VERBOSE > 0
1539                 DBG_MSG("reset_state: ring was enabled\n");
1540 #endif
1541                 refresh_ring(dinfo);
1542                 intelfbhw_do_sync(dinfo);
1543                 DO_RING_IDLE();
1544         }
1545
1546         OUTREG(PRI_RING_LENGTH, 0);
1547         OUTREG(PRI_RING_HEAD, 0);
1548         OUTREG(PRI_RING_TAIL, 0);
1549         OUTREG(PRI_RING_START, 0);
1550 }
1551
1552 /* Stop the 2D engine, and turn off the ring buffer. */
1553 void
1554 intelfbhw_2d_stop(struct intelfb_info *dinfo)
1555 {
1556 #if VERBOSE > 0
1557         DBG_MSG("intelfbhw_2d_stop: accel: %d, ring_active: %d\n", dinfo->accel,
1558                 dinfo->ring_active);
1559 #endif
1560
1561         if (!dinfo->accel)
1562                 return;
1563
1564         dinfo->ring_active = 0;
1565         reset_state(dinfo);
1566 }
1567
1568 /*
1569  * Enable the ring buffer, and initialise the 2D engine.
1570  * It is assumed that the graphics engine has been stopped by previously
1571  * calling intelfb_2d_stop().
1572  */
1573 void
1574 intelfbhw_2d_start(struct intelfb_info *dinfo)
1575 {
1576 #if VERBOSE > 0
1577         DBG_MSG("intelfbhw_2d_start: accel: %d, ring_active: %d\n",
1578                 dinfo->accel, dinfo->ring_active);
1579 #endif
1580
1581         if (!dinfo->accel)
1582                 return;
1583
1584         /* Initialise the primary ring buffer. */
1585         OUTREG(PRI_RING_LENGTH, 0);
1586         OUTREG(PRI_RING_TAIL, 0);
1587         OUTREG(PRI_RING_HEAD, 0);
1588
1589         OUTREG(PRI_RING_START, dinfo->ring.physical & RING_START_MASK);
1590         OUTREG(PRI_RING_LENGTH,
1591                 ((dinfo->ring.size - GTT_PAGE_SIZE) & RING_LENGTH_MASK) |
1592                 RING_NO_REPORT | RING_ENABLE);
1593         refresh_ring(dinfo);
1594         dinfo->ring_active = 1;
1595 }
1596
1597 /* 2D fillrect (solid fill or invert) */
1598 void
1599 intelfbhw_do_fillrect(struct intelfb_info *dinfo, u32 x, u32 y, u32 w, u32 h,
1600                       u32 color, u32 pitch, u32 bpp, u32 rop)
1601 {
1602         u32 br00, br09, br13, br14, br16;
1603
1604 #if VERBOSE > 0
1605         DBG_MSG("intelfbhw_do_fillrect: (%d,%d) %dx%d, c 0x%06x, p %d bpp %d, "
1606                 "rop 0x%02x\n", x, y, w, h, color, pitch, bpp, rop);
1607 #endif
1608
1609         br00 = COLOR_BLT_CMD;
1610         br09 = dinfo->fb_start + (y * pitch + x * (bpp / 8));
1611         br13 = (rop << ROP_SHIFT) | pitch;
1612         br14 = (h << HEIGHT_SHIFT) | ((w * (bpp / 8)) << WIDTH_SHIFT);
1613         br16 = color;
1614
1615         switch (bpp) {
1616         case 8:
1617                 br13 |= COLOR_DEPTH_8;
1618                 break;
1619         case 16:
1620                 br13 |= COLOR_DEPTH_16;
1621                 break;
1622         case 32:
1623                 br13 |= COLOR_DEPTH_32;
1624                 br00 |= WRITE_ALPHA | WRITE_RGB;
1625                 break;
1626         }
1627
1628         START_RING(6);
1629         OUT_RING(br00);
1630         OUT_RING(br13);
1631         OUT_RING(br14);
1632         OUT_RING(br09);
1633         OUT_RING(br16);
1634         OUT_RING(MI_NOOP);
1635         ADVANCE_RING();
1636
1637 #if VERBOSE > 0
1638         DBG_MSG("ring = 0x%08x, 0x%08x (%d)\n", dinfo->ring_head,
1639                 dinfo->ring_tail, dinfo->ring_space);
1640 #endif
1641 }
1642
1643 void
1644 intelfbhw_do_bitblt(struct intelfb_info *dinfo, u32 curx, u32 cury,
1645                     u32 dstx, u32 dsty, u32 w, u32 h, u32 pitch, u32 bpp)
1646 {
1647         u32 br00, br09, br11, br12, br13, br22, br23, br26;
1648
1649 #if VERBOSE > 0
1650         DBG_MSG("intelfbhw_do_bitblt: (%d,%d)->(%d,%d) %dx%d, p %d bpp %d\n",
1651                 curx, cury, dstx, dsty, w, h, pitch, bpp);
1652 #endif
1653
1654         br00 = XY_SRC_COPY_BLT_CMD;
1655         br09 = dinfo->fb_start;
1656         br11 = (pitch << PITCH_SHIFT);
1657         br12 = dinfo->fb_start;
1658         br13 = (SRC_ROP_GXCOPY << ROP_SHIFT) | (pitch << PITCH_SHIFT);
1659         br22 = (dstx << WIDTH_SHIFT) | (dsty << HEIGHT_SHIFT);
1660         br23 = ((dstx + w) << WIDTH_SHIFT) |
1661                ((dsty + h) << HEIGHT_SHIFT);
1662         br26 = (curx << WIDTH_SHIFT) | (cury << HEIGHT_SHIFT);
1663
1664         switch (bpp) {
1665         case 8:
1666                 br13 |= COLOR_DEPTH_8;
1667                 break;
1668         case 16:
1669                 br13 |= COLOR_DEPTH_16;
1670                 break;
1671         case 32:
1672                 br13 |= COLOR_DEPTH_32;
1673                 br00 |= WRITE_ALPHA | WRITE_RGB;
1674                 break;
1675         }
1676
1677         START_RING(8);
1678         OUT_RING(br00);
1679         OUT_RING(br13);
1680         OUT_RING(br22);
1681         OUT_RING(br23);
1682         OUT_RING(br09);
1683         OUT_RING(br26);
1684         OUT_RING(br11);
1685         OUT_RING(br12);
1686         ADVANCE_RING();
1687 }
1688
1689 int
1690 intelfbhw_do_drawglyph(struct intelfb_info *dinfo, u32 fg, u32 bg, u32 w,
1691                        u32 h, const u8* cdat, u32 x, u32 y, u32 pitch, u32 bpp)
1692 {
1693         int nbytes, ndwords, pad, tmp;
1694         u32 br00, br09, br13, br18, br19, br22, br23;
1695         int dat, ix, iy, iw;
1696         int i, j;
1697
1698 #if VERBOSE > 0
1699         DBG_MSG("intelfbhw_do_drawglyph: (%d,%d) %dx%d\n", x, y, w, h);
1700 #endif
1701
1702         /* size in bytes of a padded scanline */
1703         nbytes = ROUND_UP_TO(w, 16) / 8;
1704
1705         /* Total bytes of padded scanline data to write out. */
1706         nbytes = nbytes * h;
1707
1708         /*
1709          * Check if the glyph data exceeds the immediate mode limit.
1710          * It would take a large font (1K pixels) to hit this limit.
1711          */
1712         if (nbytes > MAX_MONO_IMM_SIZE)
1713                 return 0;
1714
1715         /* Src data is packaged a dword (32-bit) at a time. */
1716         ndwords = ROUND_UP_TO(nbytes, 4) / 4;
1717
1718         /*
1719          * Ring has to be padded to a quad word. But because the command starts
1720            with 7 bytes, pad only if there is an even number of ndwords
1721          */
1722         pad = !(ndwords % 2);
1723
1724         tmp = (XY_MONO_SRC_IMM_BLT_CMD & DW_LENGTH_MASK) + ndwords;
1725         br00 = (XY_MONO_SRC_IMM_BLT_CMD & ~DW_LENGTH_MASK) | tmp;
1726         br09 = dinfo->fb_start;
1727         br13 = (SRC_ROP_GXCOPY << ROP_SHIFT) | (pitch << PITCH_SHIFT);
1728         br18 = bg;
1729         br19 = fg;
1730         br22 = (x << WIDTH_SHIFT) | (y << HEIGHT_SHIFT);
1731         br23 = ((x + w) << WIDTH_SHIFT) | ((y + h) << HEIGHT_SHIFT);
1732
1733         switch (bpp) {
1734         case 8:
1735                 br13 |= COLOR_DEPTH_8;
1736                 break;
1737         case 16:
1738                 br13 |= COLOR_DEPTH_16;
1739                 break;
1740         case 32:
1741                 br13 |= COLOR_DEPTH_32;
1742                 br00 |= WRITE_ALPHA | WRITE_RGB;
1743                 break;
1744         }
1745
1746         START_RING(8 + ndwords);
1747         OUT_RING(br00);
1748         OUT_RING(br13);
1749         OUT_RING(br22);
1750         OUT_RING(br23);
1751         OUT_RING(br09);
1752         OUT_RING(br18);
1753         OUT_RING(br19);
1754         ix = iy = 0;
1755         iw = ROUND_UP_TO(w, 8) / 8;
1756         while (ndwords--) {
1757                 dat = 0;
1758                 for (j = 0; j < 2; ++j) {
1759                         for (i = 0; i < 2; ++i) {
1760                                 if (ix != iw || i == 0)
1761                                         dat |= cdat[iy*iw + ix++] << (i+j*2)*8;
1762                         }
1763                         if (ix == iw && iy != (h-1)) {
1764                                 ix = 0;
1765                                 ++iy;
1766                         }
1767                 }
1768                 OUT_RING(dat);
1769         }
1770         if (pad)
1771                 OUT_RING(MI_NOOP);
1772         ADVANCE_RING();
1773
1774         return 1;
1775 }
1776
1777 /* HW cursor functions. */
1778 void
1779 intelfbhw_cursor_init(struct intelfb_info *dinfo)
1780 {
1781         u32 tmp;
1782
1783 #if VERBOSE > 0
1784         DBG_MSG("intelfbhw_cursor_init\n");
1785 #endif
1786
1787         if (dinfo->mobile || IS_I9XX(dinfo)) {
1788                 if (!dinfo->cursor.physical)
1789                         return;
1790                 tmp = INREG(CURSOR_A_CONTROL);
1791                 tmp &= ~(CURSOR_MODE_MASK | CURSOR_MOBILE_GAMMA_ENABLE |
1792                          CURSOR_MEM_TYPE_LOCAL |
1793                          (1 << CURSOR_PIPE_SELECT_SHIFT));
1794                 tmp |= CURSOR_MODE_DISABLE;
1795                 OUTREG(CURSOR_A_CONTROL, tmp);
1796                 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1797         } else {
1798                 tmp = INREG(CURSOR_CONTROL);
1799                 tmp &= ~(CURSOR_FORMAT_MASK | CURSOR_GAMMA_ENABLE |
1800                          CURSOR_ENABLE | CURSOR_STRIDE_MASK);
1801                 tmp = CURSOR_FORMAT_3C;
1802                 OUTREG(CURSOR_CONTROL, tmp);
1803                 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.offset << 12);
1804                 tmp = (64 << CURSOR_SIZE_H_SHIFT) |
1805                       (64 << CURSOR_SIZE_V_SHIFT);
1806                 OUTREG(CURSOR_SIZE, tmp);
1807         }
1808 }
1809
1810 void
1811 intelfbhw_cursor_hide(struct intelfb_info *dinfo)
1812 {
1813         u32 tmp;
1814
1815 #if VERBOSE > 0
1816         DBG_MSG("intelfbhw_cursor_hide\n");
1817 #endif
1818
1819         dinfo->cursor_on = 0;
1820         if (dinfo->mobile || IS_I9XX(dinfo)) {
1821                 if (!dinfo->cursor.physical)
1822                         return;
1823                 tmp = INREG(CURSOR_A_CONTROL);
1824                 tmp &= ~CURSOR_MODE_MASK;
1825                 tmp |= CURSOR_MODE_DISABLE;
1826                 OUTREG(CURSOR_A_CONTROL, tmp);
1827                 /* Flush changes */
1828                 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1829         } else {
1830                 tmp = INREG(CURSOR_CONTROL);
1831                 tmp &= ~CURSOR_ENABLE;
1832                 OUTREG(CURSOR_CONTROL, tmp);
1833         }
1834 }
1835
1836 void
1837 intelfbhw_cursor_show(struct intelfb_info *dinfo)
1838 {
1839         u32 tmp;
1840
1841 #if VERBOSE > 0
1842         DBG_MSG("intelfbhw_cursor_show\n");
1843 #endif
1844
1845         dinfo->cursor_on = 1;
1846
1847         if (dinfo->cursor_blanked)
1848                 return;
1849
1850         if (dinfo->mobile || IS_I9XX(dinfo)) {
1851                 if (!dinfo->cursor.physical)
1852                         return;
1853                 tmp = INREG(CURSOR_A_CONTROL);
1854                 tmp &= ~CURSOR_MODE_MASK;
1855                 tmp |= CURSOR_MODE_64_4C_AX;
1856                 OUTREG(CURSOR_A_CONTROL, tmp);
1857                 /* Flush changes */
1858                 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1859         } else {
1860                 tmp = INREG(CURSOR_CONTROL);
1861                 tmp |= CURSOR_ENABLE;
1862                 OUTREG(CURSOR_CONTROL, tmp);
1863         }
1864 }
1865
1866 void
1867 intelfbhw_cursor_setpos(struct intelfb_info *dinfo, int x, int y)
1868 {
1869         u32 tmp;
1870
1871 #if VERBOSE > 0
1872         DBG_MSG("intelfbhw_cursor_setpos: (%d, %d)\n", x, y);
1873 #endif
1874
1875         /*
1876          * Sets the position. The coordinates are assumed to already
1877          * have any offset adjusted. Assume that the cursor is never
1878          * completely off-screen, and that x, y are always >= 0.
1879          */
1880
1881         tmp = ((x & CURSOR_POS_MASK) << CURSOR_X_SHIFT) |
1882               ((y & CURSOR_POS_MASK) << CURSOR_Y_SHIFT);
1883         OUTREG(CURSOR_A_POSITION, tmp);
1884
1885         if (IS_I9XX(dinfo)) {
1886                 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1887         }
1888 }
1889
1890 void
1891 intelfbhw_cursor_setcolor(struct intelfb_info *dinfo, u32 bg, u32 fg)
1892 {
1893 #if VERBOSE > 0
1894         DBG_MSG("intelfbhw_cursor_setcolor\n");
1895 #endif
1896
1897         OUTREG(CURSOR_A_PALETTE0, bg & CURSOR_PALETTE_MASK);
1898         OUTREG(CURSOR_A_PALETTE1, fg & CURSOR_PALETTE_MASK);
1899         OUTREG(CURSOR_A_PALETTE2, fg & CURSOR_PALETTE_MASK);
1900         OUTREG(CURSOR_A_PALETTE3, bg & CURSOR_PALETTE_MASK);
1901 }
1902
1903 void
1904 intelfbhw_cursor_load(struct intelfb_info *dinfo, int width, int height,
1905                       u8 *data)
1906 {
1907         u8 __iomem *addr = (u8 __iomem *)dinfo->cursor.virtual;
1908         int i, j, w = width / 8;
1909         int mod = width % 8, t_mask, d_mask;
1910
1911 #if VERBOSE > 0
1912         DBG_MSG("intelfbhw_cursor_load\n");
1913 #endif
1914
1915         if (!dinfo->cursor.virtual)
1916                 return;
1917
1918         t_mask = 0xff >> mod;
1919         d_mask = ~(0xff >> mod);
1920         for (i = height; i--; ) {
1921                 for (j = 0; j < w; j++) {
1922                         writeb(0x00, addr + j);
1923                         writeb(*(data++), addr + j+8);
1924                 }
1925                 if (mod) {
1926                         writeb(t_mask, addr + j);
1927                         writeb(*(data++) & d_mask, addr + j+8);
1928                 }
1929                 addr += 16;
1930         }
1931 }
1932
1933 void
1934 intelfbhw_cursor_reset(struct intelfb_info *dinfo) {
1935         u8 __iomem *addr = (u8 __iomem *)dinfo->cursor.virtual;
1936         int i, j;
1937
1938 #if VERBOSE > 0
1939         DBG_MSG("intelfbhw_cursor_reset\n");
1940 #endif
1941
1942         if (!dinfo->cursor.virtual)
1943                 return;
1944
1945         for (i = 64; i--; ) {
1946                 for (j = 0; j < 8; j++) {
1947                         writeb(0xff, addr + j+0);
1948                         writeb(0x00, addr + j+8);
1949                 }
1950                 addr += 16;
1951         }
1952 }
1953
1954 static irqreturn_t
1955 intelfbhw_irq(int irq, void *dev_id, struct pt_regs *fp) {
1956         int handled = 0;
1957         u16 tmp;
1958         struct intelfb_info *dinfo = (struct intelfb_info *)dev_id;
1959
1960         spin_lock(&dinfo->int_lock);
1961
1962         tmp = INREG16(IIR);
1963         tmp &= VSYNC_PIPE_A_INTERRUPT;
1964
1965         if (tmp == 0) {
1966                 spin_unlock(&dinfo->int_lock);
1967                 return IRQ_RETVAL(handled);
1968         }
1969
1970         OUTREG16(IIR, tmp);
1971
1972         if (tmp & VSYNC_PIPE_A_INTERRUPT) {
1973                 dinfo->vsync.count++;
1974                 if (dinfo->vsync.pan_display) {
1975                         dinfo->vsync.pan_display = 0;
1976                         OUTREG(DSPABASE, dinfo->vsync.pan_offset);
1977                 }
1978                 wake_up_interruptible(&dinfo->vsync.wait);
1979                 handled = 1;
1980         }
1981
1982         spin_unlock(&dinfo->int_lock);
1983
1984         return IRQ_RETVAL(handled);
1985 }
1986
1987 int
1988 intelfbhw_enable_irq(struct intelfb_info *dinfo, int reenable) {
1989
1990         if (!test_and_set_bit(0, &dinfo->irq_flags)) {
1991                 if (request_irq(dinfo->pdev->irq, intelfbhw_irq, SA_SHIRQ, "intelfb", dinfo)) {
1992                         clear_bit(0, &dinfo->irq_flags);
1993                         return -EINVAL;
1994                 }
1995
1996                 spin_lock_irq(&dinfo->int_lock);
1997                 OUTREG16(HWSTAM, 0xfffe);
1998                 OUTREG16(IMR, 0x0);
1999                 OUTREG16(IER, VSYNC_PIPE_A_INTERRUPT);
2000                 spin_unlock_irq(&dinfo->int_lock);
2001         } else if (reenable) {
2002                 u16 ier;
2003
2004                 spin_lock_irq(&dinfo->int_lock);
2005                 ier = INREG16(IER);
2006                 if ((ier & VSYNC_PIPE_A_INTERRUPT)) {
2007                         DBG_MSG("someone disabled the IRQ [%08X]\n", ier);
2008                         OUTREG(IER, VSYNC_PIPE_A_INTERRUPT);
2009                 }
2010                 spin_unlock_irq(&dinfo->int_lock);
2011         }
2012         return 0;
2013 }
2014
2015 void
2016 intelfbhw_disable_irq(struct intelfb_info *dinfo) {
2017         u16 tmp;
2018
2019         if (test_and_clear_bit(0, &dinfo->irq_flags)) {
2020                 if (dinfo->vsync.pan_display) {
2021                         dinfo->vsync.pan_display = 0;
2022                         OUTREG(DSPABASE, dinfo->vsync.pan_offset);
2023                 }
2024                 spin_lock_irq(&dinfo->int_lock);
2025                 OUTREG16(HWSTAM, 0xffff);
2026                 OUTREG16(IMR, 0xffff);
2027                 OUTREG16(IER, 0x0);
2028
2029                 tmp = INREG16(IIR);
2030                 OUTREG16(IIR, tmp);
2031                 spin_unlock_irq(&dinfo->int_lock);
2032
2033                 free_irq(dinfo->pdev->irq, dinfo);
2034         }
2035 }
2036
2037 int
2038 intelfbhw_wait_for_vsync(struct intelfb_info *dinfo, u32 pipe) {
2039         struct intelfb_vsync *vsync;
2040         unsigned int count;
2041         int ret;
2042
2043         switch (pipe) {
2044                 case 0:
2045                         vsync = &dinfo->vsync;
2046                         break;
2047                 default:
2048                         return -ENODEV;
2049         }
2050
2051         ret = intelfbhw_enable_irq(dinfo, 0);
2052         if (ret) {
2053                 return ret;
2054         }
2055
2056         count = vsync->count;
2057         ret = wait_event_interruptible_timeout(vsync->wait, count != vsync->count, HZ/10);
2058         if (ret < 0) {
2059                 return ret;
2060         }
2061         if (ret == 0) {
2062                 intelfbhw_enable_irq(dinfo, 1);
2063                 DBG_MSG("wait_for_vsync timed out!\n");
2064                 return -ETIMEDOUT;
2065         }
2066
2067         return 0;
2068 }