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/module.h>
  23 #include <linux/kernel.h>
  24 #include <linux/errno.h>
  25 #include <linux/string.h>
  26 #include <linux/mm.h>
  27 #include <linux/slab.h>
  28 #include <linux/delay.h>
  29 #include <linux/fb.h>
  30 #include <linux/ioport.h>
  31 #include <linux/init.h>
  32 #include <linux/pci.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/pagemap.h>
  35 #include <linux/interrupt.h>
  36
  37 #include <asm/io.h>
  38
  39 #include "intelfb.h"
  40 #include "intelfbhw.h"
  41
  42 struct pll_min_max {
  43         int min_m, max_m, min_m1, max_m1;
  44         int min_m2, max_m2, min_n, max_n;
  45         int min_p, max_p, min_p1, max_p1;
  46         int min_vco, max_vco, p_transition_clk, ref_clk;
  47         int p_inc_lo, p_inc_hi;
  48 };
  49
  50 #define PLLS_I8xx 0
  51 #define PLLS_I9xx 1
  52 #define PLLS_MAX 2
  53
  54 static struct pll_min_max plls[PLLS_MAX] = {
  55         { 108, 140, 18, 26,
  56           6, 16, 3, 16,
  57           4, 128, 0, 31,
  58           930000, 1400000, 165000, 48000,
  59           4, 2 },               /* I8xx */
  60
  61         { 75, 120, 10, 20,
  62           5, 9, 4, 7,
  63           5, 80, 1, 8,
  64           1400000, 2800000, 200000, 96000,
  65           10, 5 }               /* I9xx */
  66 };
  67
  68 int intelfbhw_get_chipset(struct pci_dev *pdev, struct intelfb_info *dinfo)
  69 {
  70         u32 tmp;
  71         if (!pdev || !dinfo)
  72                 return 1;
  73
  74         switch (pdev->device) {
  75         case PCI_DEVICE_ID_INTEL_830M:
  76                 dinfo->name = "Intel(R) 830M";
  77                 dinfo->chipset = INTEL_830M;
  78                 dinfo->mobile = 1;
  79                 dinfo->pll_index = PLLS_I8xx;
  80                 return 0;
  81         case PCI_DEVICE_ID_INTEL_845G:
  82                 dinfo->name = "Intel(R) 845G";
  83                 dinfo->chipset = INTEL_845G;
  84                 dinfo->mobile = 0;
  85                 dinfo->pll_index = PLLS_I8xx;
  86                 return 0;
  87         case PCI_DEVICE_ID_INTEL_85XGM:
  88                 tmp = 0;
  89                 dinfo->mobile = 1;
  90                 dinfo->pll_index = PLLS_I8xx;
  91                 pci_read_config_dword(pdev, INTEL_85X_CAPID, &tmp);
  92                 switch ((tmp >> INTEL_85X_VARIANT_SHIFT) &
  93                         INTEL_85X_VARIANT_MASK) {
  94                 case INTEL_VAR_855GME:
  95                         dinfo->name = "Intel(R) 855GME";
  96                         dinfo->chipset = INTEL_855GME;
  97                         return 0;
  98                 case INTEL_VAR_855GM:
  99                         dinfo->name = "Intel(R) 855GM";
 100                         dinfo->chipset = INTEL_855GM;
 101                         return 0;
 102                 case INTEL_VAR_852GME:
 103                         dinfo->name = "Intel(R) 852GME";
 104                         dinfo->chipset = INTEL_852GME;
 105                         return 0;
 106                 case INTEL_VAR_852GM:
 107                         dinfo->name = "Intel(R) 852GM";
 108                         dinfo->chipset = INTEL_852GM;
 109                         return 0;
 110                 default:
 111                         dinfo->name = "Intel(R) 852GM/855GM";
 112                         dinfo->chipset = INTEL_85XGM;
 113                         return 0;
 114                 }
 115                 break;
 116         case PCI_DEVICE_ID_INTEL_865G:
 117                 dinfo->name = "Intel(R) 865G";
 118                 dinfo->chipset = INTEL_865G;
 119                 dinfo->mobile = 0;
 120                 dinfo->pll_index = PLLS_I8xx;
 121                 return 0;
 122         case PCI_DEVICE_ID_INTEL_915G:
 123                 dinfo->name = "Intel(R) 915G";
 124                 dinfo->chipset = INTEL_915G;
 125                 dinfo->mobile = 0;
 126                 dinfo->pll_index = PLLS_I9xx;
 127                 return 0;
 128         case PCI_DEVICE_ID_INTEL_915GM:
 129                 dinfo->name = "Intel(R) 915GM";
 130                 dinfo->chipset = INTEL_915GM;
 131                 dinfo->mobile = 1;
 132                 dinfo->pll_index = PLLS_I9xx;
 133                 return 0;
 134         case PCI_DEVICE_ID_INTEL_945G:
 135                 dinfo->name = "Intel(R) 945G";
 136                 dinfo->chipset = INTEL_945G;
 137                 dinfo->mobile = 0;
 138                 dinfo->pll_index = PLLS_I9xx;
 139                 return 0;
 140         case PCI_DEVICE_ID_INTEL_945GM:
 141                 dinfo->name = "Intel(R) 945GM";
 142                 dinfo->chipset = INTEL_945GM;
 143                 dinfo->mobile = 1;
 144                 dinfo->pll_index = PLLS_I9xx;
 145                 return 0;
 146         default:
 147                 return 1;
 148         }
 149 }
 150
 151 int intelfbhw_get_memory(struct pci_dev *pdev, int *aperture_size,
 152                          int *stolen_size)
 153 {
 154         struct pci_dev *bridge_dev;
 155         u16 tmp;
 156         int stolen_overhead;
 157
 158         if (!pdev || !aperture_size || !stolen_size)
 159                 return 1;
 160
 161         /* Find the bridge device.  It is always 0:0.0 */
 162         if (!(bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0)))) {
 163                 ERR_MSG("cannot find bridge device\n");
 164                 return 1;
 165         }
 166
 167         /* Get the fb aperture size and "stolen" memory amount. */
 168         tmp = 0;
 169         pci_read_config_word(bridge_dev, INTEL_GMCH_CTRL, &tmp);
 170         pci_dev_put(bridge_dev);
 171
 172         switch (pdev->device) {
 173         case PCI_DEVICE_ID_INTEL_915G:
 174         case PCI_DEVICE_ID_INTEL_915GM:
 175         case PCI_DEVICE_ID_INTEL_945G:
 176         case PCI_DEVICE_ID_INTEL_945GM:
 177                 /* 915 and 945 chipsets support a 256MB aperture.
 178                    Aperture size is determined by inspected the
 179                    base address of the aperture. */
 180                 if (pci_resource_start(pdev, 2) & 0x08000000)
 181                         *aperture_size = MB(128);
 182                 else
 183                         *aperture_size = MB(256);
 184                 break;
 185         default:
 186                 if ((tmp & INTEL_GMCH_MEM_MASK) == INTEL_GMCH_MEM_64M)
 187                         *aperture_size = MB(64);
 188                 else
 189                         *aperture_size = MB(128);
 190                 break;
 191         }
 192
 193         /* Stolen memory size is reduced by the GTT and the popup.
 194            GTT is 1K per MB of aperture size, and popup is 4K. */
 195         stolen_overhead = (*aperture_size / MB(1)) + 4;
 196         switch(pdev->device) {
 197         case PCI_DEVICE_ID_INTEL_830M:
 198         case PCI_DEVICE_ID_INTEL_845G:
 199                 switch (tmp & INTEL_830_GMCH_GMS_MASK) {
 200                 case INTEL_830_GMCH_GMS_STOLEN_512:
 201                         *stolen_size = KB(512) - KB(stolen_overhead);
 202                         return 0;
 203                 case INTEL_830_GMCH_GMS_STOLEN_1024:
 204                         *stolen_size = MB(1) - KB(stolen_overhead);
 205                         return 0;
 206                 case INTEL_830_GMCH_GMS_STOLEN_8192:
 207                         *stolen_size = MB(8) - KB(stolen_overhead);
 208                         return 0;
 209                 case INTEL_830_GMCH_GMS_LOCAL:
 210                         ERR_MSG("only local memory found\n");
 211                         return 1;
 212                 case INTEL_830_GMCH_GMS_DISABLED:
 213                         ERR_MSG("video memory is disabled\n");
 214                         return 1;
 215                 default:
 216                         ERR_MSG("unexpected GMCH_GMS value: 0x%02x\n",
 217                                 tmp & INTEL_830_GMCH_GMS_MASK);
 218                         return 1;
 219                 }
 220                 break;
 221         default:
 222                 switch (tmp & INTEL_855_GMCH_GMS_MASK) {
 223                 case INTEL_855_GMCH_GMS_STOLEN_1M:
 224                         *stolen_size = MB(1) - KB(stolen_overhead);
 225                         return 0;
 226                 case INTEL_855_GMCH_GMS_STOLEN_4M:
 227                         *stolen_size = MB(4) - KB(stolen_overhead);
 228                         return 0;
 229                 case INTEL_855_GMCH_GMS_STOLEN_8M:
 230                         *stolen_size = MB(8) - KB(stolen_overhead);
 231                         return 0;
 232                 case INTEL_855_GMCH_GMS_STOLEN_16M:
 233                         *stolen_size = MB(16) - KB(stolen_overhead);
 234                         return 0;
 235                 case INTEL_855_GMCH_GMS_STOLEN_32M:
 236                         *stolen_size = MB(32) - KB(stolen_overhead);
 237                         return 0;
 238                 case INTEL_915G_GMCH_GMS_STOLEN_48M:
 239                         *stolen_size = MB(48) - KB(stolen_overhead);
 240                         return 0;
 241                 case INTEL_915G_GMCH_GMS_STOLEN_64M:
 242                         *stolen_size = MB(64) - KB(stolen_overhead);
 243                         return 0;
 244                 case INTEL_855_GMCH_GMS_DISABLED:
 245                         ERR_MSG("video memory is disabled\n");
 246                         return 0;
 247                 default:
 248                         ERR_MSG("unexpected GMCH_GMS value: 0x%02x\n",
 249                                 tmp & INTEL_855_GMCH_GMS_MASK);
 250                         return 1;
 251                 }
 252         }
 253 }
 254
 255 int intelfbhw_check_non_crt(struct intelfb_info *dinfo)
 256 {
 257         int dvo = 0;
 258
 259         if (INREG(LVDS) & PORT_ENABLE)
 260                 dvo |= LVDS_PORT;
 261         if (INREG(DVOA) & PORT_ENABLE)
 262                 dvo |= DVOA_PORT;
 263         if (INREG(DVOB) & PORT_ENABLE)
 264                 dvo |= DVOB_PORT;
 265         if (INREG(DVOC) & PORT_ENABLE)
 266                 dvo |= DVOC_PORT;
 267
 268         return dvo;
 269 }
 270
 271 const char * intelfbhw_dvo_to_string(int dvo)
 272 {
 273         if (dvo & DVOA_PORT)
 274                 return "DVO port A";
 275         else if (dvo & DVOB_PORT)
 276                 return "DVO port B";
 277         else if (dvo & DVOC_PORT)
 278                 return "DVO port C";
 279         else if (dvo & LVDS_PORT)
 280                 return "LVDS port";
 281         else
 282                 return NULL;
 283 }
 284
 285
 286 int intelfbhw_validate_mode(struct intelfb_info *dinfo,
 287                             struct fb_var_screeninfo *var)
 288 {
 289         int bytes_per_pixel;
 290         int tmp;
 291
 292 #if VERBOSE > 0
 293         DBG_MSG("intelfbhw_validate_mode\n");
 294 #endif
 295
 296         bytes_per_pixel = var->bits_per_pixel / 8;
 297         if (bytes_per_pixel == 3)
 298                 bytes_per_pixel = 4;
 299
 300         /* Check if enough video memory. */
 301         tmp = var->yres_virtual * var->xres_virtual * bytes_per_pixel;
 302         if (tmp > dinfo->fb.size) {
 303                 WRN_MSG("Not enough video ram for mode "
 304                         "(%d KByte vs %d KByte).\n",
 305                         BtoKB(tmp), BtoKB(dinfo->fb.size));
 306                 return 1;
 307         }
 308
 309         /* Check if x/y limits are OK. */
 310         if (var->xres - 1 > HACTIVE_MASK) {
 311                 WRN_MSG("X resolution too large (%d vs %d).\n",
 312                         var->xres, HACTIVE_MASK + 1);
 313                 return 1;
 314         }
 315         if (var->yres - 1 > VACTIVE_MASK) {
 316                 WRN_MSG("Y resolution too large (%d vs %d).\n",
 317                         var->yres, VACTIVE_MASK + 1);
 318                 return 1;
 319         }
 320         if (var->xres < 4) {
 321                 WRN_MSG("X resolution too small (%d vs 4).\n", var->xres);
 322                 return 1;
 323         }
 324         if (var->yres < 4) {
 325                 WRN_MSG("Y resolution too small (%d vs 4).\n", var->yres);
 326                 return 1;
 327         }
 328
 329         /* Check for doublescan modes. */
 330         if (var->vmode & FB_VMODE_DOUBLE) {
 331                 WRN_MSG("Mode is double-scan.\n");
 332                 return 1;
 333         }
 334
 335         if ((var->vmode & FB_VMODE_INTERLACED) && (var->yres & 1)) {
 336                 WRN_MSG("Odd number of lines in interlaced mode\n");
 337                 return 1;
 338         }
 339
 340         /* Check if clock is OK. */
 341         tmp = 1000000000 / var->pixclock;
 342         if (tmp < MIN_CLOCK) {
 343                 WRN_MSG("Pixel clock is too low (%d MHz vs %d MHz).\n",
 344                         (tmp + 500) / 1000, MIN_CLOCK / 1000);
 345                 return 1;
 346         }
 347         if (tmp > MAX_CLOCK) {
 348                 WRN_MSG("Pixel clock is too high (%d MHz vs %d MHz).\n",
 349                         (tmp + 500) / 1000, MAX_CLOCK / 1000);
 350                 return 1;
 351         }
 352
 353         return 0;
 354 }
 355
 356 int intelfbhw_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 357 {
 358         struct intelfb_info *dinfo = GET_DINFO(info);
 359         u32 offset, xoffset, yoffset;
 360
 361 #if VERBOSE > 0
 362         DBG_MSG("intelfbhw_pan_display\n");
 363 #endif
 364
 365         xoffset = ROUND_DOWN_TO(var->xoffset, 8);
 366         yoffset = var->yoffset;
 367
 368         if ((xoffset + var->xres > var->xres_virtual) ||
 369             (yoffset + var->yres > var->yres_virtual))
 370                 return -EINVAL;
 371
 372         offset = (yoffset * dinfo->pitch) +
 373                  (xoffset * var->bits_per_pixel) / 8;
 374
 375         offset += dinfo->fb.offset << 12;
 376
 377         dinfo->vsync.pan_offset = offset;
 378         if ((var->activate & FB_ACTIVATE_VBL) &&
 379             !intelfbhw_enable_irq(dinfo))
 380                 dinfo->vsync.pan_display = 1;
 381         else {
 382                 dinfo->vsync.pan_display = 0;
 383                 OUTREG(DSPABASE, offset);
 384         }
 385
 386         return 0;
 387 }
 388
 389 /* Blank the screen. */
 390 void intelfbhw_do_blank(int blank, struct fb_info *info)
 391 {
 392         struct intelfb_info *dinfo = GET_DINFO(info);
 393         u32 tmp;
 394
 395 #if VERBOSE > 0
 396         DBG_MSG("intelfbhw_do_blank: blank is %d\n", blank);
 397 #endif
 398
 399         /* Turn plane A on or off */
 400         tmp = INREG(DSPACNTR);
 401         if (blank)
 402                 tmp &= ~DISPPLANE_PLANE_ENABLE;
 403         else
 404                 tmp |= DISPPLANE_PLANE_ENABLE;
 405         OUTREG(DSPACNTR, tmp);
 406         /* Flush */
 407         tmp = INREG(DSPABASE);
 408         OUTREG(DSPABASE, tmp);
 409
 410         /* Turn off/on the HW cursor */
 411 #if VERBOSE > 0
 412         DBG_MSG("cursor_on is %d\n", dinfo->cursor_on);
 413 #endif
 414         if (dinfo->cursor_on) {
 415                 if (blank)
 416                         intelfbhw_cursor_hide(dinfo);
 417                 else
 418                         intelfbhw_cursor_show(dinfo);
 419                 dinfo->cursor_on = 1;
 420         }
 421         dinfo->cursor_blanked = blank;
 422
 423         /* Set DPMS level */
 424         tmp = INREG(ADPA) & ~ADPA_DPMS_CONTROL_MASK;
 425         switch (blank) {
 426         case FB_BLANK_UNBLANK:
 427         case FB_BLANK_NORMAL:
 428                 tmp |= ADPA_DPMS_D0;
 429                 break;
 430         case FB_BLANK_VSYNC_SUSPEND:
 431                 tmp |= ADPA_DPMS_D1;
 432                 break;
 433         case FB_BLANK_HSYNC_SUSPEND:
 434                 tmp |= ADPA_DPMS_D2;
 435                 break;
 436         case FB_BLANK_POWERDOWN:
 437                 tmp |= ADPA_DPMS_D3;
 438                 break;
 439         }
 440         OUTREG(ADPA, tmp);
 441
 442         return;
 443 }
 444
 445
 446 void intelfbhw_setcolreg(struct intelfb_info *dinfo, unsigned regno,
 447                          unsigned red, unsigned green, unsigned blue,
 448                          unsigned transp)
 449 {
 450         u32 palette_reg = (dinfo->pipe == PIPE_A) ?
 451                           PALETTE_A : PALETTE_B;
 452
 453 #if VERBOSE > 0
 454         DBG_MSG("intelfbhw_setcolreg: %d: (%d, %d, %d)\n",
 455                 regno, red, green, blue);
 456 #endif
 457
 458         OUTREG(palette_reg + (regno << 2),
 459                (red << PALETTE_8_RED_SHIFT) |
 460                (green << PALETTE_8_GREEN_SHIFT) |
 461                (blue << PALETTE_8_BLUE_SHIFT));
 462 }
 463
 464
 465 int intelfbhw_read_hw_state(struct intelfb_info *dinfo,
 466                             struct intelfb_hwstate *hw, 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,
 614                        int lvds)
 615 {
 616         struct pll_min_max *pll = &plls[index];
 617         u32 m, vco, p;
 618
 619         m = (5 * (m1 + 2)) + (m2 + 2);
 620         n += 2;
 621         vco = pll->ref_clk * m / n;
 622
 623         if (index == PLLS_I8xx)
 624                 p = ((p1 + 2) * (1 << (p2 + 1)));
 625         else
 626                 p = ((p1) * (p2 ? 5 : 10));
 627         return vco / p;
 628 }
 629
 630 #if REGDUMP
 631 static void intelfbhw_get_p1p2(struct intelfb_info *dinfo, int dpll,
 632                                int *o_p1, int *o_p2)
 633 {
 634         int p1, p2;
 635
 636         if (IS_I9XX(dinfo)) {
 637                 if (dpll & DPLL_P1_FORCE_DIV2)
 638                         p1 = 1;
 639                 else
 640                         p1 = (dpll >> DPLL_P1_SHIFT) & 0xff;
 641
 642                 p1 = ffs(p1);
 643
 644                 p2 = (dpll >> DPLL_I9XX_P2_SHIFT) & DPLL_P2_MASK;
 645         } else {
 646                 if (dpll & DPLL_P1_FORCE_DIV2)
 647                         p1 = 0;
 648                 else
 649                         p1 = (dpll >> DPLL_P1_SHIFT) & DPLL_P1_MASK;
 650                 p2 = (dpll >> DPLL_P2_SHIFT) & DPLL_P2_MASK;
 651         }
 652
 653         *o_p1 = p1;
 654         *o_p2 = p2;
 655 }
 656 #endif
 657
 658
 659 void intelfbhw_print_hw_state(struct intelfb_info *dinfo,
 660                               struct intelfb_hwstate *hw)
 661 {
 662 #if REGDUMP
 663         int i, m1, m2, n, p1, p2;
 664         int index = dinfo->pll_index;
 665         DBG_MSG("intelfbhw_print_hw_state\n");
 666
 667         if (!hw)
 668                 return;
 669         /* Read in as much of the HW state as possible. */
 670         printk("hw state dump start\n");
 671         printk("        VGA0_DIVISOR:           0x%08x\n", hw->vga0_divisor);
 672         printk("        VGA1_DIVISOR:           0x%08x\n", hw->vga1_divisor);
 673         printk("        VGAPD:                  0x%08x\n", hw->vga_pd);
 674         n = (hw->vga0_divisor >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 675         m1 = (hw->vga0_divisor >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 676         m2 = (hw->vga0_divisor >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 677
 678         intelfbhw_get_p1p2(dinfo, hw->vga_pd, &p1, &p2);
 679
 680         printk("        VGA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
 681                m1, m2, n, p1, p2);
 682         printk("        VGA0: clock is %d\n",
 683                calc_vclock(index, m1, m2, n, p1, p2, 0));
 684
 685         n = (hw->vga1_divisor >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 686         m1 = (hw->vga1_divisor >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 687         m2 = (hw->vga1_divisor >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 688
 689         intelfbhw_get_p1p2(dinfo, hw->vga_pd, &p1, &p2);
 690         printk("        VGA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
 691                m1, m2, n, p1, p2);
 692         printk("        VGA1: clock is %d\n",
 693                calc_vclock(index, m1, m2, n, p1, p2, 0));
 694
 695         printk("        DPLL_A:                 0x%08x\n", hw->dpll_a);
 696         printk("        DPLL_B:                 0x%08x\n", hw->dpll_b);
 697         printk("        FPA0:                   0x%08x\n", hw->fpa0);
 698         printk("        FPA1:                   0x%08x\n", hw->fpa1);
 699         printk("        FPB0:                   0x%08x\n", hw->fpb0);
 700         printk("        FPB1:                   0x%08x\n", hw->fpb1);
 701
 702         n = (hw->fpa0 >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 703         m1 = (hw->fpa0 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 704         m2 = (hw->fpa0 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 705
 706         intelfbhw_get_p1p2(dinfo, hw->dpll_a, &p1, &p2);
 707
 708         printk("        PLLA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
 709                m1, m2, n, p1, p2);
 710         printk("        PLLA0: clock is %d\n",
 711                calc_vclock(index, m1, m2, n, p1, p2, 0));
 712
 713         n = (hw->fpa1 >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 714         m1 = (hw->fpa1 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 715         m2 = (hw->fpa1 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
 716
 717         intelfbhw_get_p1p2(dinfo, hw->dpll_a, &p1, &p2);
 718
 719         printk("        PLLA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
 720                m1, m2, n, p1, p2);
 721         printk("        PLLA1: clock is %d\n",
 722                calc_vclock(index, m1, m2, n, p1, p2, 0));
 723
 724 #if 0
 725         printk("        PALETTE_A:\n");
 726         for (i = 0; i < PALETTE_8_ENTRIES)
 727                 printk("        %3d:    0x%08x\n", i, hw->palette_a[i]);
 728         printk("        PALETTE_B:\n");
 729         for (i = 0; i < PALETTE_8_ENTRIES)
 730                 printk("        %3d:    0x%08x\n", i, hw->palette_b[i]);
 731 #endif
 732
 733         printk("        HTOTAL_A:               0x%08x\n", hw->htotal_a);
 734         printk("        HBLANK_A:               0x%08x\n", hw->hblank_a);
 735         printk("        HSYNC_A:                0x%08x\n", hw->hsync_a);
 736         printk("        VTOTAL_A:               0x%08x\n", hw->vtotal_a);
 737         printk("        VBLANK_A:               0x%08x\n", hw->vblank_a);
 738         printk("        VSYNC_A:                0x%08x\n", hw->vsync_a);
 739         printk("        SRC_SIZE_A:             0x%08x\n", hw->src_size_a);
 740         printk("        BCLRPAT_A:              0x%08x\n", hw->bclrpat_a);
 741         printk("        HTOTAL_B:               0x%08x\n", hw->htotal_b);
 742         printk("        HBLANK_B:               0x%08x\n", hw->hblank_b);
 743         printk("        HSYNC_B:                0x%08x\n", hw->hsync_b);
 744         printk("        VTOTAL_B:               0x%08x\n", hw->vtotal_b);
 745         printk("        VBLANK_B:               0x%08x\n", hw->vblank_b);
 746         printk("        VSYNC_B:                0x%08x\n", hw->vsync_b);
 747         printk("        SRC_SIZE_B:             0x%08x\n", hw->src_size_b);
 748         printk("        BCLRPAT_B:              0x%08x\n", hw->bclrpat_b);
 749
 750         printk("        ADPA:                   0x%08x\n", hw->adpa);
 751         printk("        DVOA:                   0x%08x\n", hw->dvoa);
 752         printk("        DVOB:                   0x%08x\n", hw->dvob);
 753         printk("        DVOC:                   0x%08x\n", hw->dvoc);
 754         printk("        DVOA_SRCDIM:            0x%08x\n", hw->dvoa_srcdim);
 755         printk("        DVOB_SRCDIM:            0x%08x\n", hw->dvob_srcdim);
 756         printk("        DVOC_SRCDIM:            0x%08x\n", hw->dvoc_srcdim);
 757         printk("        LVDS:                   0x%08x\n", hw->lvds);
 758
 759         printk("        PIPEACONF:              0x%08x\n", hw->pipe_a_conf);
 760         printk("        PIPEBCONF:              0x%08x\n", hw->pipe_b_conf);
 761         printk("        DISPARB:                0x%08x\n", hw->disp_arb);
 762
 763         printk("        CURSOR_A_CONTROL:       0x%08x\n", hw->cursor_a_control);
 764         printk("        CURSOR_B_CONTROL:       0x%08x\n", hw->cursor_b_control);
 765         printk("        CURSOR_A_BASEADDR:      0x%08x\n", hw->cursor_a_base);
 766         printk("        CURSOR_B_BASEADDR:      0x%08x\n", hw->cursor_b_base);
 767
 768         printk("        CURSOR_A_PALETTE:       ");
 769         for (i = 0; i < 4; i++) {
 770                 printk("0x%08x", hw->cursor_a_palette[i]);
 771                 if (i < 3)
 772                         printk(", ");
 773         }
 774         printk("\n");
 775         printk("        CURSOR_B_PALETTE:       ");
 776         for (i = 0; i < 4; i++) {
 777                 printk("0x%08x", hw->cursor_b_palette[i]);
 778                 if (i < 3)
 779                         printk(", ");
 780         }
 781         printk("\n");
 782
 783         printk("        CURSOR_SIZE:            0x%08x\n", hw->cursor_size);
 784
 785         printk("        DSPACNTR:               0x%08x\n", hw->disp_a_ctrl);
 786         printk("        DSPBCNTR:               0x%08x\n", hw->disp_b_ctrl);
 787         printk("        DSPABASE:               0x%08x\n", hw->disp_a_base);
 788         printk("        DSPBBASE:               0x%08x\n", hw->disp_b_base);
 789         printk("        DSPASTRIDE:             0x%08x\n", hw->disp_a_stride);
 790         printk("        DSPBSTRIDE:             0x%08x\n", hw->disp_b_stride);
 791
 792         printk("        VGACNTRL:               0x%08x\n", hw->vgacntrl);
 793         printk("        ADD_ID:                 0x%08x\n", hw->add_id);
 794
 795         for (i = 0; i < 7; i++) {
 796                 printk("        SWF0%d                  0x%08x\n", i,
 797                         hw->swf0x[i]);
 798         }
 799         for (i = 0; i < 7; i++) {
 800                 printk("        SWF1%d                  0x%08x\n", i,
 801                         hw->swf1x[i]);
 802         }
 803         for (i = 0; i < 3; i++) {
 804                 printk("        SWF3%d                  0x%08x\n", i,
 805                        hw->swf3x[i]);
 806         }
 807         for (i = 0; i < 8; i++)
 808                 printk("        FENCE%d                 0x%08x\n", i,
 809                        hw->fence[i]);
 810
 811         printk("        INSTPM                  0x%08x\n", hw->instpm);
 812         printk("        MEM_MODE                0x%08x\n", hw->mem_mode);
 813         printk("        FW_BLC_0                0x%08x\n", hw->fw_blc_0);
 814         printk("        FW_BLC_1                0x%08x\n", hw->fw_blc_1);
 815
 816         printk("        HWSTAM                  0x%04x\n", hw->hwstam);
 817         printk("        IER                     0x%04x\n", hw->ier);
 818         printk("        IIR                     0x%04x\n", hw->iir);
 819         printk("        IMR                     0x%04x\n", hw->imr);
 820         printk("hw state dump end\n");
 821 #endif
 822 }
 823
 824
 825
 826 /* Split the M parameter into M1 and M2. */
 827 static int splitm(int index, unsigned int m, unsigned int *retm1,
 828                   unsigned int *retm2)
 829 {
 830         int m1, m2;
 831         int testm;
 832         struct pll_min_max *pll = &plls[index];
 833
 834         /* no point optimising too much - brute force m */
 835         for (m1 = pll->min_m1; m1 < pll->max_m1 + 1; m1++) {
 836                 for (m2 = pll->min_m2; m2 < pll->max_m2 + 1; m2++) {
 837                         testm = (5 * (m1 + 2)) + (m2 + 2);
 838                         if (testm == m) {
 839                                 *retm1 = (unsigned int)m1;
 840                                 *retm2 = (unsigned int)m2;
 841                                 return 0;
 842                         }
 843                 }
 844         }
 845         return 1;
 846 }
 847
 848 /* Split the P parameter into P1 and P2. */
 849 static int splitp(int index, unsigned int p, unsigned int *retp1,
 850                   unsigned int *retp2)
 851 {
 852         int p1, p2;
 853         struct pll_min_max *pll = &plls[index];
 854
 855         if (index == PLLS_I9xx) {
 856                 p2 = (p % 10) ? 1 : 0;
 857
 858                 p1 = p / (p2 ? 5 : 10);
 859
 860                 *retp1 = (unsigned int)p1;
 861                 *retp2 = (unsigned int)p2;
 862                 return 0;
 863         }
 864
 865         if (p % 4 == 0)
 866                 p2 = 1;
 867         else
 868                 p2 = 0;
 869         p1 = (p / (1 << (p2 + 1))) - 2;
 870         if (p % 4 == 0 && p1 < pll->min_p1) {
 871                 p2 = 0;
 872                 p1 = (p / (1 << (p2 + 1))) - 2;
 873         }
 874         if (p1 < pll->min_p1 || p1 > pll->max_p1 ||
 875             (p1 + 2) * (1 << (p2 + 1)) != p) {
 876                 return 1;
 877         } else {
 878                 *retp1 = (unsigned int)p1;
 879                 *retp2 = (unsigned int)p2;
 880                 return 0;
 881         }
 882 }
 883
 884 static int calc_pll_params(int index, int clock, u32 *retm1, u32 *retm2,
 885                            u32 *retn, u32 *retp1, u32 *retp2, u32 *retclock)
 886 {
 887         u32 m1, m2, n, p1, p2, n1, testm;
 888         u32 f_vco, p, p_best = 0, m, f_out = 0;
 889         u32 err_max, err_target, err_best = 10000000;
 890         u32 n_best = 0, m_best = 0, f_best, f_err;
 891         u32 p_min, p_max, p_inc, div_max;
 892         struct pll_min_max *pll = &plls[index];
 893
 894         /* Accept 0.5% difference, but aim for 0.1% */
 895         err_max = 5 * clock / 1000;
 896         err_target = clock / 1000;
 897
 898         DBG_MSG("Clock is %d\n", clock);
 899
 900         div_max = pll->max_vco / clock;
 901
 902         p_inc = (clock <= pll->p_transition_clk) ? pll->p_inc_lo : pll->p_inc_hi;
 903         p_min = p_inc;
 904         p_max = ROUND_DOWN_TO(div_max, p_inc);
 905         if (p_min < pll->min_p)
 906                 p_min = pll->min_p;
 907         if (p_max > pll->max_p)
 908                 p_max = pll->max_p;
 909
 910         DBG_MSG("p range is %d-%d (%d)\n", p_min, p_max, p_inc);
 911
 912         p = p_min;
 913         do {
 914                 if (splitp(index, p, &p1, &p2)) {
 915                         WRN_MSG("cannot split p = %d\n", p);
 916                         p += p_inc;
 917                         continue;
 918                 }
 919                 n = pll->min_n;
 920                 f_vco = clock * p;
 921
 922                 do {
 923                         m = ROUND_UP_TO(f_vco * n, pll->ref_clk) / pll->ref_clk;
 924                         if (m < pll->min_m)
 925                                 m = pll->min_m + 1;
 926                         if (m > pll->max_m)
 927                                 m = pll->max_m - 1;
 928                         for (testm = m - 1; testm <= m; testm++) {
 929                                 f_out = calc_vclock3(index, testm, n, p);
 930                                 if (splitm(index, testm, &m1, &m2)) {
 931                                         WRN_MSG("cannot split m = %d\n",
 932                                                 testm);
 933                                         continue;
 934                                 }
 935                                 if (clock > f_out)
 936                                         f_err = clock - f_out;
 937                                 else/* slightly bias the error for bigger clocks */
 938                                         f_err = f_out - clock + 1;
 939
 940                                 if (f_err < err_best) {
 941                                         m_best = testm;
 942                                         n_best = n;
 943                                         p_best = p;
 944                                         f_best = f_out;
 945                                         err_best = f_err;
 946                                 }
 947                         }
 948                         n++;
 949                 } while ((n <= pll->max_n) && (f_out >= clock));
 950                 p += p_inc;
 951         } while ((p <= p_max));
 952
 953         if (!m_best) {
 954                 WRN_MSG("cannot find parameters for clock %d\n", clock);
 955                 return 1;
 956         }
 957         m = m_best;
 958         n = n_best;
 959         p = p_best;
 960         splitm(index, m, &m1, &m2);
 961         splitp(index, p, &p1, &p2);
 962         n1 = n - 2;
 963
 964         DBG_MSG("m, n, p: %d (%d,%d), %d (%d), %d (%d,%d), "
 965                 "f: %d (%d), VCO: %d\n",
 966                 m, m1, m2, n, n1, p, p1, p2,
 967                 calc_vclock3(index, m, n, p),
 968                 calc_vclock(index, m1, m2, n1, p1, p2, 0),
 969                 calc_vclock3(index, m, n, p) * p);
 970         *retm1 = m1;
 971         *retm2 = m2;
 972         *retn = n1;
 973         *retp1 = p1;
 974         *retp2 = p2;
 975         *retclock = calc_vclock(index, m1, m2, n1, p1, p2, 0);
 976
 977         return 0;
 978 }
 979
 980 static __inline__ int check_overflow(u32 value, u32 limit,
 981                                      const char *description)
 982 {
 983         if (value > limit) {
 984                 WRN_MSG("%s value %d exceeds limit %d\n",
 985                         description, value, limit);
 986                 return 1;
 987         }
 988         return 0;
 989 }
 990
 991 /* It is assumed that hw is filled in with the initial state information. */
 992 int intelfbhw_mode_to_hw(struct intelfb_info *dinfo,
 993                          struct intelfb_hwstate *hw,
 994                          struct fb_var_screeninfo *var)
 995 {
 996         int pipe = PIPE_A;
 997         u32 *dpll, *fp0, *fp1;
 998         u32 m1, m2, n, p1, p2, clock_target, clock;
 999         u32 hsync_start, hsync_end, hblank_start, hblank_end, htotal, hactive;
1000         u32 vsync_start, vsync_end, vblank_start, vblank_end, vtotal, vactive;
1001         u32 vsync_pol, hsync_pol;
1002         u32 *vs, *vb, *vt, *hs, *hb, *ht, *ss, *pipe_conf;
1003         u32 stride_alignment;
1004
1005         DBG_MSG("intelfbhw_mode_to_hw\n");
1006
1007         /* Disable VGA */
1008         hw->vgacntrl |= VGA_DISABLE;
1009
1010         /* Check whether pipe A or pipe B is enabled. */
1011         if (hw->pipe_a_conf & PIPECONF_ENABLE)
1012                 pipe = PIPE_A;
1013         else if (hw->pipe_b_conf & PIPECONF_ENABLE)
1014                 pipe = PIPE_B;
1015
1016         /* Set which pipe's registers will be set. */
1017         if (pipe == PIPE_B) {
1018                 dpll = &hw->dpll_b;
1019                 fp0 = &hw->fpb0;
1020                 fp1 = &hw->fpb1;
1021                 hs = &hw->hsync_b;
1022                 hb = &hw->hblank_b;
1023                 ht = &hw->htotal_b;
1024                 vs = &hw->vsync_b;
1025                 vb = &hw->vblank_b;
1026                 vt = &hw->vtotal_b;
1027                 ss = &hw->src_size_b;
1028                 pipe_conf = &hw->pipe_b_conf;
1029         } else {
1030                 dpll = &hw->dpll_a;
1031                 fp0 = &hw->fpa0;
1032                 fp1 = &hw->fpa1;
1033                 hs = &hw->hsync_a;
1034                 hb = &hw->hblank_a;
1035                 ht = &hw->htotal_a;
1036                 vs = &hw->vsync_a;
1037                 vb = &hw->vblank_a;
1038                 vt = &hw->vtotal_a;
1039                 ss = &hw->src_size_a;
1040                 pipe_conf = &hw->pipe_a_conf;
1041         }
1042
1043         /* Use ADPA register for sync control. */
1044         hw->adpa &= ~ADPA_USE_VGA_HVPOLARITY;
1045
1046         /* sync polarity */
1047         hsync_pol = (var->sync & FB_SYNC_HOR_HIGH_ACT) ?
1048                         ADPA_SYNC_ACTIVE_HIGH : ADPA_SYNC_ACTIVE_LOW;
1049         vsync_pol = (var->sync & FB_SYNC_VERT_HIGH_ACT) ?
1050                         ADPA_SYNC_ACTIVE_HIGH : ADPA_SYNC_ACTIVE_LOW;
1051         hw->adpa &= ~((ADPA_SYNC_ACTIVE_MASK << ADPA_VSYNC_ACTIVE_SHIFT) |
1052                       (ADPA_SYNC_ACTIVE_MASK << ADPA_HSYNC_ACTIVE_SHIFT));
1053         hw->adpa |= (hsync_pol << ADPA_HSYNC_ACTIVE_SHIFT) |
1054                     (vsync_pol << ADPA_VSYNC_ACTIVE_SHIFT);
1055
1056         /* Connect correct pipe to the analog port DAC */
1057         hw->adpa &= ~(PIPE_MASK << ADPA_PIPE_SELECT_SHIFT);
1058         hw->adpa |= (pipe << ADPA_PIPE_SELECT_SHIFT);
1059
1060         /* Set DPMS state to D0 (on) */
1061         hw->adpa &= ~ADPA_DPMS_CONTROL_MASK;
1062         hw->adpa |= ADPA_DPMS_D0;
1063
1064         hw->adpa |= ADPA_DAC_ENABLE;
1065
1066         *dpll |= (DPLL_VCO_ENABLE | DPLL_VGA_MODE_DISABLE);
1067         *dpll &= ~(DPLL_RATE_SELECT_MASK | DPLL_REFERENCE_SELECT_MASK);
1068         *dpll |= (DPLL_REFERENCE_DEFAULT | DPLL_RATE_SELECT_FP0);
1069
1070         /* Desired clock in kHz */
1071         clock_target = 1000000000 / var->pixclock;
1072
1073         if (calc_pll_params(dinfo->pll_index, clock_target, &m1, &m2,
1074                             &n, &p1, &p2, &clock)) {
1075                 WRN_MSG("calc_pll_params failed\n");
1076                 return 1;
1077         }
1078
1079         /* Check for overflow. */
1080         if (check_overflow(p1, DPLL_P1_MASK, "PLL P1 parameter"))
1081                 return 1;
1082         if (check_overflow(p2, DPLL_P2_MASK, "PLL P2 parameter"))
1083                 return 1;
1084         if (check_overflow(m1, FP_DIVISOR_MASK, "PLL M1 parameter"))
1085                 return 1;
1086         if (check_overflow(m2, FP_DIVISOR_MASK, "PLL M2 parameter"))
1087                 return 1;
1088         if (check_overflow(n, FP_DIVISOR_MASK, "PLL N parameter"))
1089                 return 1;
1090
1091         *dpll &= ~DPLL_P1_FORCE_DIV2;
1092         *dpll &= ~((DPLL_P2_MASK << DPLL_P2_SHIFT) |
1093                    (DPLL_P1_MASK << DPLL_P1_SHIFT));
1094
1095         if (IS_I9XX(dinfo)) {
1096                 *dpll |= (p2 << DPLL_I9XX_P2_SHIFT);
1097                 *dpll |= (1 << (p1 - 1)) << DPLL_P1_SHIFT;
1098         } else
1099                 *dpll |= (p2 << DPLL_P2_SHIFT) | (p1 << DPLL_P1_SHIFT);
1100
1101         *fp0 = (n << FP_N_DIVISOR_SHIFT) |
1102                (m1 << FP_M1_DIVISOR_SHIFT) |
1103                (m2 << FP_M2_DIVISOR_SHIFT);
1104         *fp1 = *fp0;
1105
1106         hw->dvob &= ~PORT_ENABLE;
1107         hw->dvoc &= ~PORT_ENABLE;
1108
1109         /* Use display plane A. */
1110         hw->disp_a_ctrl |= DISPPLANE_PLANE_ENABLE;
1111         hw->disp_a_ctrl &= ~DISPPLANE_GAMMA_ENABLE;
1112         hw->disp_a_ctrl &= ~DISPPLANE_PIXFORMAT_MASK;
1113         switch (intelfb_var_to_depth(var)) {
1114         case 8:
1115                 hw->disp_a_ctrl |= DISPPLANE_8BPP | DISPPLANE_GAMMA_ENABLE;
1116                 break;
1117         case 15:
1118                 hw->disp_a_ctrl |= DISPPLANE_15_16BPP;
1119                 break;
1120         case 16:
1121                 hw->disp_a_ctrl |= DISPPLANE_16BPP;
1122                 break;
1123         case 24:
1124                 hw->disp_a_ctrl |= DISPPLANE_32BPP_NO_ALPHA;
1125                 break;
1126         }
1127         hw->disp_a_ctrl &= ~(PIPE_MASK << DISPPLANE_SEL_PIPE_SHIFT);
1128         hw->disp_a_ctrl |= (pipe << DISPPLANE_SEL_PIPE_SHIFT);
1129
1130         /* Set CRTC registers. */
1131         hactive = var->xres;
1132         hsync_start = hactive + var->right_margin;
1133         hsync_end = hsync_start + var->hsync_len;
1134         htotal = hsync_end + var->left_margin;
1135         hblank_start = hactive;
1136         hblank_end = htotal;
1137
1138         DBG_MSG("H: act %d, ss %d, se %d, tot %d bs %d, be %d\n",
1139                 hactive, hsync_start, hsync_end, htotal, hblank_start,
1140                 hblank_end);
1141
1142         vactive = var->yres;
1143         if (var->vmode & FB_VMODE_INTERLACED)
1144                 vactive--; /* the chip adds 2 halflines automatically */
1145         vsync_start = vactive + var->lower_margin;
1146         vsync_end = vsync_start + var->vsync_len;
1147         vtotal = vsync_end + var->upper_margin;
1148         vblank_start = vactive;
1149         vblank_end = vtotal;
1150         vblank_end = vsync_end + 1;
1151
1152         DBG_MSG("V: act %d, ss %d, se %d, tot %d bs %d, be %d\n",
1153                 vactive, vsync_start, vsync_end, vtotal, vblank_start,
1154                 vblank_end);
1155
1156         /* Adjust for register values, and check for overflow. */
1157         hactive--;
1158         if (check_overflow(hactive, HACTIVE_MASK, "CRTC hactive"))
1159                 return 1;
1160         hsync_start--;
1161         if (check_overflow(hsync_start, HSYNCSTART_MASK, "CRTC hsync_start"))
1162                 return 1;
1163         hsync_end--;
1164         if (check_overflow(hsync_end, HSYNCEND_MASK, "CRTC hsync_end"))
1165                 return 1;
1166         htotal--;
1167         if (check_overflow(htotal, HTOTAL_MASK, "CRTC htotal"))
1168                 return 1;
1169         hblank_start--;
1170         if (check_overflow(hblank_start, HBLANKSTART_MASK, "CRTC hblank_start"))
1171                 return 1;
1172         hblank_end--;
1173         if (check_overflow(hblank_end, HBLANKEND_MASK, "CRTC hblank_end"))
1174                 return 1;
1175
1176         vactive--;
1177         if (check_overflow(vactive, VACTIVE_MASK, "CRTC vactive"))
1178                 return 1;
1179         vsync_start--;
1180         if (check_overflow(vsync_start, VSYNCSTART_MASK, "CRTC vsync_start"))
1181                 return 1;
1182         vsync_end--;
1183         if (check_overflow(vsync_end, VSYNCEND_MASK, "CRTC vsync_end"))
1184                 return 1;
1185         vtotal--;
1186         if (check_overflow(vtotal, VTOTAL_MASK, "CRTC vtotal"))
1187                 return 1;
1188         vblank_start--;
1189         if (check_overflow(vblank_start, VBLANKSTART_MASK, "CRTC vblank_start"))
1190                 return 1;
1191         vblank_end--;
1192         if (check_overflow(vblank_end, VBLANKEND_MASK, "CRTC vblank_end"))
1193                 return 1;
1194
1195         *ht = (htotal << HTOTAL_SHIFT) | (hactive << HACTIVE_SHIFT);
1196         *hb = (hblank_start << HBLANKSTART_SHIFT) |
1197               (hblank_end << HSYNCEND_SHIFT);
1198         *hs = (hsync_start << HSYNCSTART_SHIFT) | (hsync_end << HSYNCEND_SHIFT);
1199
1200         *vt = (vtotal << VTOTAL_SHIFT) | (vactive << VACTIVE_SHIFT);
1201         *vb = (vblank_start << VBLANKSTART_SHIFT) |
1202               (vblank_end << VSYNCEND_SHIFT);
1203         *vs = (vsync_start << VSYNCSTART_SHIFT) | (vsync_end << VSYNCEND_SHIFT);
1204         *ss = (hactive << SRC_SIZE_HORIZ_SHIFT) |
1205               (vactive << SRC_SIZE_VERT_SHIFT);
1206
1207         hw->disp_a_stride = dinfo->pitch;
1208         DBG_MSG("pitch is %d\n", hw->disp_a_stride);
1209
1210         hw->disp_a_base = hw->disp_a_stride * var->yoffset +
1211                           var->xoffset * var->bits_per_pixel / 8;
1212
1213         hw->disp_a_base += dinfo->fb.offset << 12;
1214
1215         /* Check stride alignment. */
1216         stride_alignment = IS_I9XX(dinfo) ? STRIDE_ALIGNMENT_I9XX :
1217                                             STRIDE_ALIGNMENT;
1218         if (hw->disp_a_stride % stride_alignment != 0) {
1219                 WRN_MSG("display stride %d has bad alignment %d\n",
1220                         hw->disp_a_stride, stride_alignment);
1221                 return 1;
1222         }
1223
1224         /* Set the palette to 8-bit mode. */
1225         *pipe_conf &= ~PIPECONF_GAMMA;
1226
1227         if (var->vmode & FB_VMODE_INTERLACED)
1228                 *pipe_conf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
1229         else
1230                 *pipe_conf &= ~PIPECONF_INTERLACE_MASK;
1231
1232         return 0;
1233 }
1234
1235 /* Program a (non-VGA) video mode. */
1236 int intelfbhw_program_mode(struct intelfb_info *dinfo,
1237                            const struct intelfb_hwstate *hw, int blank)
1238 {
1239         int pipe = PIPE_A;
1240         u32 tmp;
1241         const u32 *dpll, *fp0, *fp1, *pipe_conf;
1242         const u32 *hs, *ht, *hb, *vs, *vt, *vb, *ss;
1243         u32 dpll_reg, fp0_reg, fp1_reg, pipe_conf_reg, pipe_stat_reg;
1244         u32 hsync_reg, htotal_reg, hblank_reg;
1245         u32 vsync_reg, vtotal_reg, vblank_reg;
1246         u32 src_size_reg;
1247         u32 count, tmp_val[3];
1248
1249         /* Assume single pipe, display plane A, analog CRT. */
1250
1251 #if VERBOSE > 0
1252         DBG_MSG("intelfbhw_program_mode\n");
1253 #endif
1254
1255         /* Disable VGA */
1256         tmp = INREG(VGACNTRL);
1257         tmp |= VGA_DISABLE;
1258         OUTREG(VGACNTRL, tmp);
1259
1260         /* Check whether pipe A or pipe B is enabled. */
1261         if (hw->pipe_a_conf & PIPECONF_ENABLE)
1262                 pipe = PIPE_A;
1263         else if (hw->pipe_b_conf & PIPECONF_ENABLE)
1264                 pipe = PIPE_B;
1265
1266         dinfo->pipe = pipe;
1267
1268         if (pipe == PIPE_B) {
1269                 dpll = &hw->dpll_b;
1270                 fp0 = &hw->fpb0;
1271                 fp1 = &hw->fpb1;
1272                 pipe_conf = &hw->pipe_b_conf;
1273                 hs = &hw->hsync_b;
1274                 hb = &hw->hblank_b;
1275                 ht = &hw->htotal_b;
1276                 vs = &hw->vsync_b;
1277                 vb = &hw->vblank_b;
1278                 vt = &hw->vtotal_b;
1279                 ss = &hw->src_size_b;
1280                 dpll_reg = DPLL_B;
1281                 fp0_reg = FPB0;
1282                 fp1_reg = FPB1;
1283                 pipe_conf_reg = PIPEBCONF;
1284                 pipe_stat_reg = PIPEBSTAT;
1285                 hsync_reg = HSYNC_B;
1286                 htotal_reg = HTOTAL_B;
1287                 hblank_reg = HBLANK_B;
1288                 vsync_reg = VSYNC_B;
1289                 vtotal_reg = VTOTAL_B;
1290                 vblank_reg = VBLANK_B;
1291                 src_size_reg = SRC_SIZE_B;
1292         } else {
1293                 dpll = &hw->dpll_a;
1294                 fp0 = &hw->fpa0;
1295                 fp1 = &hw->fpa1;
1296                 pipe_conf = &hw->pipe_a_conf;
1297                 hs = &hw->hsync_a;
1298                 hb = &hw->hblank_a;
1299                 ht = &hw->htotal_a;
1300                 vs = &hw->vsync_a;
1301                 vb = &hw->vblank_a;
1302                 vt = &hw->vtotal_a;
1303                 ss = &hw->src_size_a;
1304                 dpll_reg = DPLL_A;
1305                 fp0_reg = FPA0;
1306                 fp1_reg = FPA1;
1307                 pipe_conf_reg = PIPEACONF;
1308                 pipe_stat_reg = PIPEASTAT;
1309                 hsync_reg = HSYNC_A;
1310                 htotal_reg = HTOTAL_A;
1311                 hblank_reg = HBLANK_A;
1312                 vsync_reg = VSYNC_A;
1313                 vtotal_reg = VTOTAL_A;
1314                 vblank_reg = VBLANK_A;
1315                 src_size_reg = SRC_SIZE_A;
1316         }
1317
1318         /* turn off pipe */
1319         tmp = INREG(pipe_conf_reg);
1320         tmp &= ~PIPECONF_ENABLE;
1321         OUTREG(pipe_conf_reg, tmp);
1322
1323         count = 0;
1324         do {
1325                 tmp_val[count % 3] = INREG(PIPEA_DSL);
1326                 if ((tmp_val[0] == tmp_val[1]) && (tmp_val[1] == tmp_val[2]))
1327                         break;
1328                 count++;
1329                 udelay(1);
1330                 if (count % 200 == 0) {
1331                         tmp = INREG(pipe_conf_reg);
1332                         tmp &= ~PIPECONF_ENABLE;
1333                         OUTREG(pipe_conf_reg, tmp);
1334                 }
1335         } while (count < 2000);
1336
1337         OUTREG(ADPA, INREG(ADPA) & ~ADPA_DAC_ENABLE);
1338
1339         /* Disable planes A and B. */
1340         tmp = INREG(DSPACNTR);
1341         tmp &= ~DISPPLANE_PLANE_ENABLE;
1342         OUTREG(DSPACNTR, tmp);
1343         tmp = INREG(DSPBCNTR);
1344         tmp &= ~DISPPLANE_PLANE_ENABLE;
1345         OUTREG(DSPBCNTR, tmp);
1346
1347         /* Wait for vblank. For now, just wait for a 50Hz cycle (20ms)) */
1348         mdelay(20);
1349
1350         OUTREG(DVOB, INREG(DVOB) & ~PORT_ENABLE);
1351         OUTREG(DVOC, INREG(DVOC) & ~PORT_ENABLE);
1352         OUTREG(ADPA, INREG(ADPA) & ~ADPA_DAC_ENABLE);
1353
1354         /* Disable Sync */
1355         tmp = INREG(ADPA);
1356         tmp &= ~ADPA_DPMS_CONTROL_MASK;
1357         tmp |= ADPA_DPMS_D3;
1358         OUTREG(ADPA, tmp);
1359
1360         /* do some funky magic - xyzzy */
1361         OUTREG(0x61204, 0xabcd0000);
1362
1363         /* turn off PLL */
1364         tmp = INREG(dpll_reg);
1365         tmp &= ~DPLL_VCO_ENABLE;
1366         OUTREG(dpll_reg, tmp);
1367
1368         /* Set PLL parameters */
1369         OUTREG(fp0_reg, *fp0);
1370         OUTREG(fp1_reg, *fp1);
1371
1372         /* Enable PLL */
1373         OUTREG(dpll_reg, *dpll);
1374
1375         /* Set DVOs B/C */
1376         OUTREG(DVOB, hw->dvob);
1377         OUTREG(DVOC, hw->dvoc);
1378
1379         /* undo funky magic */
1380         OUTREG(0x61204, 0x00000000);
1381
1382         /* Set ADPA */
1383         OUTREG(ADPA, INREG(ADPA) | ADPA_DAC_ENABLE);
1384         OUTREG(ADPA, (hw->adpa & ~(ADPA_DPMS_CONTROL_MASK)) | ADPA_DPMS_D3);
1385
1386         /* Set pipe parameters */
1387         OUTREG(hsync_reg, *hs);
1388         OUTREG(hblank_reg, *hb);
1389         OUTREG(htotal_reg, *ht);
1390         OUTREG(vsync_reg, *vs);
1391         OUTREG(vblank_reg, *vb);
1392         OUTREG(vtotal_reg, *vt);
1393         OUTREG(src_size_reg, *ss);
1394
1395         switch (dinfo->info->var.vmode & (FB_VMODE_INTERLACED |
1396                                           FB_VMODE_ODD_FLD_FIRST)) {
1397         case FB_VMODE_INTERLACED | FB_VMODE_ODD_FLD_FIRST:
1398                 OUTREG(pipe_stat_reg, 0xFFFF | PIPESTAT_FLD_EVT_ODD_EN);
1399                 break;
1400         case FB_VMODE_INTERLACED: /* even lines first */
1401                 OUTREG(pipe_stat_reg, 0xFFFF | PIPESTAT_FLD_EVT_EVEN_EN);
1402                 break;
1403         default:                /* non-interlaced */
1404                 OUTREG(pipe_stat_reg, 0xFFFF); /* clear all status bits only */
1405         }
1406         /* Enable pipe */
1407         OUTREG(pipe_conf_reg, *pipe_conf | PIPECONF_ENABLE);
1408
1409         /* Enable sync */
1410         tmp = INREG(ADPA);
1411         tmp &= ~ADPA_DPMS_CONTROL_MASK;
1412         tmp |= ADPA_DPMS_D0;
1413         OUTREG(ADPA, tmp);
1414
1415         /* setup display plane */
1416         if (dinfo->pdev->device == PCI_DEVICE_ID_INTEL_830M) {
1417                 /*
1418                  *      i830M errata: the display plane must be enabled
1419                  *      to allow writes to the other bits in the plane
1420                  *      control register.
1421                  */
1422                 tmp = INREG(DSPACNTR);
1423                 if ((tmp & DISPPLANE_PLANE_ENABLE) != DISPPLANE_PLANE_ENABLE) {
1424                         tmp |= DISPPLANE_PLANE_ENABLE;
1425                         OUTREG(DSPACNTR, tmp);
1426                         OUTREG(DSPACNTR,
1427                                hw->disp_a_ctrl|DISPPLANE_PLANE_ENABLE);
1428                         mdelay(1);
1429                 }
1430         }
1431
1432         OUTREG(DSPACNTR, hw->disp_a_ctrl & ~DISPPLANE_PLANE_ENABLE);
1433         OUTREG(DSPASTRIDE, hw->disp_a_stride);
1434         OUTREG(DSPABASE, hw->disp_a_base);
1435
1436         /* Enable plane */
1437         if (!blank) {
1438                 tmp = INREG(DSPACNTR);
1439                 tmp |= DISPPLANE_PLANE_ENABLE;
1440                 OUTREG(DSPACNTR, tmp);
1441                 OUTREG(DSPABASE, hw->disp_a_base);
1442         }
1443
1444         return 0;
1445 }
1446
1447 /* forward declarations */
1448 static void refresh_ring(struct intelfb_info *dinfo);
1449 static void reset_state(struct intelfb_info *dinfo);
1450 static void do_flush(struct intelfb_info *dinfo);
1451
1452 static  u32 get_ring_space(struct intelfb_info *dinfo)
1453 {
1454         u32 ring_space;
1455
1456         if (dinfo->ring_tail >= dinfo->ring_head)
1457                 ring_space = dinfo->ring.size -
1458                         (dinfo->ring_tail - dinfo->ring_head);
1459         else
1460                 ring_space = dinfo->ring_head - dinfo->ring_tail;
1461
1462         if (ring_space > RING_MIN_FREE)
1463                 ring_space -= RING_MIN_FREE;
1464         else
1465                 ring_space = 0;
1466
1467         return ring_space;
1468 }
1469
1470 static int wait_ring(struct intelfb_info *dinfo, int n)
1471 {
1472         int i = 0;
1473         unsigned long end;
1474         u32 last_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
1475
1476 #if VERBOSE > 0
1477         DBG_MSG("wait_ring: %d\n", n);
1478 #endif
1479
1480         end = jiffies + (HZ * 3);
1481         while (dinfo->ring_space < n) {
1482                 dinfo->ring_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
1483                 dinfo->ring_space = get_ring_space(dinfo);
1484
1485                 if (dinfo->ring_head != last_head) {
1486                         end = jiffies + (HZ * 3);
1487                         last_head = dinfo->ring_head;
1488                 }
1489                 i++;
1490                 if (time_before(end, jiffies)) {
1491                         if (!i) {
1492                                 /* Try again */
1493                                 reset_state(dinfo);
1494                                 refresh_ring(dinfo);
1495                                 do_flush(dinfo);
1496                                 end = jiffies + (HZ * 3);
1497                                 i = 1;
1498                         } else {
1499                                 WRN_MSG("ring buffer : space: %d wanted %d\n",
1500                                         dinfo->ring_space, n);
1501                                 WRN_MSG("lockup - turning off hardware "
1502                                         "acceleration\n");
1503                                 dinfo->ring_lockup = 1;
1504                                 break;
1505                         }
1506                 }
1507                 udelay(1);
1508         }
1509         return i;
1510 }
1511
1512 static void do_flush(struct intelfb_info *dinfo)
1513 {
1514         START_RING(2);
1515         OUT_RING(MI_FLUSH | MI_WRITE_DIRTY_STATE | MI_INVALIDATE_MAP_CACHE);
1516         OUT_RING(MI_NOOP);
1517         ADVANCE_RING();
1518 }
1519
1520 void intelfbhw_do_sync(struct intelfb_info *dinfo)
1521 {
1522 #if VERBOSE > 0
1523         DBG_MSG("intelfbhw_do_sync\n");
1524 #endif
1525
1526         if (!dinfo->accel)
1527                 return;
1528
1529         /*
1530          * Send a flush, then wait until the ring is empty.  This is what
1531          * the XFree86 driver does, and actually it doesn't seem a lot worse
1532          * than the recommended method (both have problems).
1533          */
1534         do_flush(dinfo);
1535         wait_ring(dinfo, dinfo->ring.size - RING_MIN_FREE);
1536         dinfo->ring_space = dinfo->ring.size - RING_MIN_FREE;
1537 }
1538
1539 static void refresh_ring(struct intelfb_info *dinfo)
1540 {
1541 #if VERBOSE > 0
1542         DBG_MSG("refresh_ring\n");
1543 #endif
1544
1545         dinfo->ring_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK;
1546         dinfo->ring_tail = INREG(PRI_RING_TAIL) & RING_TAIL_MASK;
1547         dinfo->ring_space = get_ring_space(dinfo);
1548 }
1549
1550 static void reset_state(struct intelfb_info *dinfo)
1551 {
1552         int i;
1553         u32 tmp;
1554
1555 #if VERBOSE > 0
1556         DBG_MSG("reset_state\n");
1557 #endif
1558
1559         for (i = 0; i < FENCE_NUM; i++)
1560                 OUTREG(FENCE + (i << 2), 0);
1561
1562         /* Flush the ring buffer if it's enabled. */
1563         tmp = INREG(PRI_RING_LENGTH);
1564         if (tmp & RING_ENABLE) {
1565 #if VERBOSE > 0
1566                 DBG_MSG("reset_state: ring was enabled\n");
1567 #endif
1568                 refresh_ring(dinfo);
1569                 intelfbhw_do_sync(dinfo);
1570                 DO_RING_IDLE();
1571         }
1572
1573         OUTREG(PRI_RING_LENGTH, 0);
1574         OUTREG(PRI_RING_HEAD, 0);
1575         OUTREG(PRI_RING_TAIL, 0);
1576         OUTREG(PRI_RING_START, 0);
1577 }
1578
1579 /* Stop the 2D engine, and turn off the ring buffer. */
1580 void intelfbhw_2d_stop(struct intelfb_info *dinfo)
1581 {
1582 #if VERBOSE > 0
1583         DBG_MSG("intelfbhw_2d_stop: accel: %d, ring_active: %d\n",
1584                 dinfo->accel, dinfo->ring_active);
1585 #endif
1586
1587         if (!dinfo->accel)
1588                 return;
1589
1590         dinfo->ring_active = 0;
1591         reset_state(dinfo);
1592 }
1593
1594 /*
1595  * Enable the ring buffer, and initialise the 2D engine.
1596  * It is assumed that the graphics engine has been stopped by previously
1597  * calling intelfb_2d_stop().
1598  */
1599 void intelfbhw_2d_start(struct intelfb_info *dinfo)
1600 {
1601 #if VERBOSE > 0
1602         DBG_MSG("intelfbhw_2d_start: accel: %d, ring_active: %d\n",
1603                 dinfo->accel, dinfo->ring_active);
1604 #endif
1605
1606         if (!dinfo->accel)
1607                 return;
1608
1609         /* Initialise the primary ring buffer. */
1610         OUTREG(PRI_RING_LENGTH, 0);
1611         OUTREG(PRI_RING_TAIL, 0);
1612         OUTREG(PRI_RING_HEAD, 0);
1613
1614         OUTREG(PRI_RING_START, dinfo->ring.physical & RING_START_MASK);
1615         OUTREG(PRI_RING_LENGTH,
1616                 ((dinfo->ring.size - GTT_PAGE_SIZE) & RING_LENGTH_MASK) |
1617                 RING_NO_REPORT | RING_ENABLE);
1618         refresh_ring(dinfo);
1619         dinfo->ring_active = 1;
1620 }
1621
1622 /* 2D fillrect (solid fill or invert) */
1623 void intelfbhw_do_fillrect(struct intelfb_info *dinfo, u32 x, u32 y, u32 w,
1624                            u32 h, u32 color, u32 pitch, u32 bpp, u32 rop)
1625 {
1626         u32 br00, br09, br13, br14, br16;
1627
1628 #if VERBOSE > 0
1629         DBG_MSG("intelfbhw_do_fillrect: (%d,%d) %dx%d, c 0x%06x, p %d bpp %d, "
1630                 "rop 0x%02x\n", x, y, w, h, color, pitch, bpp, rop);
1631 #endif
1632
1633         br00 = COLOR_BLT_CMD;
1634         br09 = dinfo->fb_start + (y * pitch + x * (bpp / 8));
1635         br13 = (rop << ROP_SHIFT) | pitch;
1636         br14 = (h << HEIGHT_SHIFT) | ((w * (bpp / 8)) << WIDTH_SHIFT);
1637         br16 = color;
1638
1639         switch (bpp) {
1640         case 8:
1641                 br13 |= COLOR_DEPTH_8;
1642                 break;
1643         case 16:
1644                 br13 |= COLOR_DEPTH_16;
1645                 break;
1646         case 32:
1647                 br13 |= COLOR_DEPTH_32;
1648                 br00 |= WRITE_ALPHA | WRITE_RGB;
1649                 break;
1650         }
1651
1652         START_RING(6);
1653         OUT_RING(br00);
1654         OUT_RING(br13);
1655         OUT_RING(br14);
1656         OUT_RING(br09);
1657         OUT_RING(br16);
1658         OUT_RING(MI_NOOP);
1659         ADVANCE_RING();
1660
1661 #if VERBOSE > 0
1662         DBG_MSG("ring = 0x%08x, 0x%08x (%d)\n", dinfo->ring_head,
1663                 dinfo->ring_tail, dinfo->ring_space);
1664 #endif
1665 }
1666
1667 void
1668 intelfbhw_do_bitblt(struct intelfb_info *dinfo, u32 curx, u32 cury,
1669                     u32 dstx, u32 dsty, u32 w, u32 h, u32 pitch, u32 bpp)
1670 {
1671         u32 br00, br09, br11, br12, br13, br22, br23, br26;
1672
1673 #if VERBOSE > 0
1674         DBG_MSG("intelfbhw_do_bitblt: (%d,%d)->(%d,%d) %dx%d, p %d bpp %d\n",
1675                 curx, cury, dstx, dsty, w, h, pitch, bpp);
1676 #endif
1677
1678         br00 = XY_SRC_COPY_BLT_CMD;
1679         br09 = dinfo->fb_start;
1680         br11 = (pitch << PITCH_SHIFT);
1681         br12 = dinfo->fb_start;
1682         br13 = (SRC_ROP_GXCOPY << ROP_SHIFT) | (pitch << PITCH_SHIFT);
1683         br22 = (dstx << WIDTH_SHIFT) | (dsty << HEIGHT_SHIFT);
1684         br23 = ((dstx + w) << WIDTH_SHIFT) |
1685                ((dsty + h) << HEIGHT_SHIFT);
1686         br26 = (curx << WIDTH_SHIFT) | (cury << HEIGHT_SHIFT);
1687
1688         switch (bpp) {
1689         case 8:
1690                 br13 |= COLOR_DEPTH_8;
1691                 break;
1692         case 16:
1693                 br13 |= COLOR_DEPTH_16;
1694                 break;
1695         case 32:
1696                 br13 |= COLOR_DEPTH_32;
1697                 br00 |= WRITE_ALPHA | WRITE_RGB;
1698                 break;
1699         }
1700
1701         START_RING(8);
1702         OUT_RING(br00);
1703         OUT_RING(br13);
1704         OUT_RING(br22);
1705         OUT_RING(br23);
1706         OUT_RING(br09);
1707         OUT_RING(br26);
1708         OUT_RING(br11);
1709         OUT_RING(br12);
1710         ADVANCE_RING();
1711 }
1712
1713 int intelfbhw_do_drawglyph(struct intelfb_info *dinfo, u32 fg, u32 bg, u32 w,
1714                            u32 h, const u8* cdat, u32 x, u32 y, u32 pitch,
1715                            u32 bpp)
1716 {
1717         int nbytes, ndwords, pad, tmp;
1718         u32 br00, br09, br13, br18, br19, br22, br23;
1719         int dat, ix, iy, iw;
1720         int i, j;
1721
1722 #if VERBOSE > 0
1723         DBG_MSG("intelfbhw_do_drawglyph: (%d,%d) %dx%d\n", x, y, w, h);
1724 #endif
1725
1726         /* size in bytes of a padded scanline */
1727         nbytes = ROUND_UP_TO(w, 16) / 8;
1728
1729         /* Total bytes of padded scanline data to write out. */
1730         nbytes = nbytes * h;
1731
1732         /*
1733          * Check if the glyph data exceeds the immediate mode limit.
1734          * It would take a large font (1K pixels) to hit this limit.
1735          */
1736         if (nbytes > MAX_MONO_IMM_SIZE)
1737                 return 0;
1738
1739         /* Src data is packaged a dword (32-bit) at a time. */
1740         ndwords = ROUND_UP_TO(nbytes, 4) / 4;
1741
1742         /*
1743          * Ring has to be padded to a quad word. But because the command starts
1744            with 7 bytes, pad only if there is an even number of ndwords
1745          */
1746         pad = !(ndwords % 2);
1747
1748         tmp = (XY_MONO_SRC_IMM_BLT_CMD & DW_LENGTH_MASK) + ndwords;
1749         br00 = (XY_MONO_SRC_IMM_BLT_CMD & ~DW_LENGTH_MASK) | tmp;
1750         br09 = dinfo->fb_start;
1751         br13 = (SRC_ROP_GXCOPY << ROP_SHIFT) | (pitch << PITCH_SHIFT);
1752         br18 = bg;
1753         br19 = fg;
1754         br22 = (x << WIDTH_SHIFT) | (y << HEIGHT_SHIFT);
1755         br23 = ((x + w) << WIDTH_SHIFT) | ((y + h) << HEIGHT_SHIFT);
1756
1757         switch (bpp) {
1758         case 8:
1759                 br13 |= COLOR_DEPTH_8;
1760                 break;
1761         case 16:
1762                 br13 |= COLOR_DEPTH_16;
1763                 break;
1764         case 32:
1765                 br13 |= COLOR_DEPTH_32;
1766                 br00 |= WRITE_ALPHA | WRITE_RGB;
1767                 break;
1768         }
1769
1770         START_RING(8 + ndwords);
1771         OUT_RING(br00);
1772         OUT_RING(br13);
1773         OUT_RING(br22);
1774         OUT_RING(br23);
1775         OUT_RING(br09);
1776         OUT_RING(br18);
1777         OUT_RING(br19);
1778         ix = iy = 0;
1779         iw = ROUND_UP_TO(w, 8) / 8;
1780         while (ndwords--) {
1781                 dat = 0;
1782                 for (j = 0; j < 2; ++j) {
1783                         for (i = 0; i < 2; ++i) {
1784                                 if (ix != iw || i == 0)
1785                                         dat |= cdat[iy*iw + ix++] << (i+j*2)*8;
1786                         }
1787                         if (ix == iw && iy != (h-1)) {
1788                                 ix = 0;
1789                                 ++iy;
1790                         }
1791                 }
1792                 OUT_RING(dat);
1793         }
1794         if (pad)
1795                 OUT_RING(MI_NOOP);
1796         ADVANCE_RING();
1797
1798         return 1;
1799 }
1800
1801 /* HW cursor functions. */
1802 void intelfbhw_cursor_init(struct intelfb_info *dinfo)
1803 {
1804         u32 tmp;
1805
1806 #if VERBOSE > 0
1807         DBG_MSG("intelfbhw_cursor_init\n");
1808 #endif
1809
1810         if (dinfo->mobile || IS_I9XX(dinfo)) {
1811                 if (!dinfo->cursor.physical)
1812                         return;
1813                 tmp = INREG(CURSOR_A_CONTROL);
1814                 tmp &= ~(CURSOR_MODE_MASK | CURSOR_MOBILE_GAMMA_ENABLE |
1815                          CURSOR_MEM_TYPE_LOCAL |
1816                          (1 << CURSOR_PIPE_SELECT_SHIFT));
1817                 tmp |= CURSOR_MODE_DISABLE;
1818                 OUTREG(CURSOR_A_CONTROL, tmp);
1819                 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1820         } else {
1821                 tmp = INREG(CURSOR_CONTROL);
1822                 tmp &= ~(CURSOR_FORMAT_MASK | CURSOR_GAMMA_ENABLE |
1823                          CURSOR_ENABLE | CURSOR_STRIDE_MASK);
1824                 tmp = CURSOR_FORMAT_3C;
1825                 OUTREG(CURSOR_CONTROL, tmp);
1826                 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.offset << 12);
1827                 tmp = (64 << CURSOR_SIZE_H_SHIFT) |
1828                       (64 << CURSOR_SIZE_V_SHIFT);
1829                 OUTREG(CURSOR_SIZE, tmp);
1830         }
1831 }
1832
1833 void intelfbhw_cursor_hide(struct intelfb_info *dinfo)
1834 {
1835         u32 tmp;
1836
1837 #if VERBOSE > 0
1838         DBG_MSG("intelfbhw_cursor_hide\n");
1839 #endif
1840
1841         dinfo->cursor_on = 0;
1842         if (dinfo->mobile || IS_I9XX(dinfo)) {
1843                 if (!dinfo->cursor.physical)
1844                         return;
1845                 tmp = INREG(CURSOR_A_CONTROL);
1846                 tmp &= ~CURSOR_MODE_MASK;
1847                 tmp |= CURSOR_MODE_DISABLE;
1848                 OUTREG(CURSOR_A_CONTROL, tmp);
1849                 /* Flush changes */
1850                 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1851         } else {
1852                 tmp = INREG(CURSOR_CONTROL);
1853                 tmp &= ~CURSOR_ENABLE;
1854                 OUTREG(CURSOR_CONTROL, tmp);
1855         }
1856 }
1857
1858 void intelfbhw_cursor_show(struct intelfb_info *dinfo)
1859 {
1860         u32 tmp;
1861
1862 #if VERBOSE > 0
1863         DBG_MSG("intelfbhw_cursor_show\n");
1864 #endif
1865
1866         dinfo->cursor_on = 1;
1867
1868         if (dinfo->cursor_blanked)
1869                 return;
1870
1871         if (dinfo->mobile || IS_I9XX(dinfo)) {
1872                 if (!dinfo->cursor.physical)
1873                         return;
1874                 tmp = INREG(CURSOR_A_CONTROL);
1875                 tmp &= ~CURSOR_MODE_MASK;
1876                 tmp |= CURSOR_MODE_64_4C_AX;
1877                 OUTREG(CURSOR_A_CONTROL, tmp);
1878                 /* Flush changes */
1879                 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1880         } else {
1881                 tmp = INREG(CURSOR_CONTROL);
1882                 tmp |= CURSOR_ENABLE;
1883                 OUTREG(CURSOR_CONTROL, tmp);
1884         }
1885 }
1886
1887 void intelfbhw_cursor_setpos(struct intelfb_info *dinfo, int x, int y)
1888 {
1889         u32 tmp;
1890
1891 #if VERBOSE > 0
1892         DBG_MSG("intelfbhw_cursor_setpos: (%d, %d)\n", x, y);
1893 #endif
1894
1895         /*
1896          * Sets the position. The coordinates are assumed to already
1897          * have any offset adjusted. Assume that the cursor is never
1898          * completely off-screen, and that x, y are always >= 0.
1899          */
1900
1901         tmp = ((x & CURSOR_POS_MASK) << CURSOR_X_SHIFT) |
1902               ((y & CURSOR_POS_MASK) << CURSOR_Y_SHIFT);
1903         OUTREG(CURSOR_A_POSITION, tmp);
1904
1905         if (IS_I9XX(dinfo))
1906                 OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical);
1907 }
1908
1909 void intelfbhw_cursor_setcolor(struct intelfb_info *dinfo, u32 bg, u32 fg)
1910 {
1911 #if VERBOSE > 0
1912         DBG_MSG("intelfbhw_cursor_setcolor\n");
1913 #endif
1914
1915         OUTREG(CURSOR_A_PALETTE0, bg & CURSOR_PALETTE_MASK);
1916         OUTREG(CURSOR_A_PALETTE1, fg & CURSOR_PALETTE_MASK);
1917         OUTREG(CURSOR_A_PALETTE2, fg & CURSOR_PALETTE_MASK);
1918         OUTREG(CURSOR_A_PALETTE3, bg & CURSOR_PALETTE_MASK);
1919 }
1920
1921 void intelfbhw_cursor_load(struct intelfb_info *dinfo, int width, int height,
1922                            u8 *data)
1923 {
1924         u8 __iomem *addr = (u8 __iomem *)dinfo->cursor.virtual;
1925         int i, j, w = width / 8;
1926         int mod = width % 8, t_mask, d_mask;
1927
1928 #if VERBOSE > 0
1929         DBG_MSG("intelfbhw_cursor_load\n");
1930 #endif
1931
1932         if (!dinfo->cursor.virtual)
1933                 return;
1934
1935         t_mask = 0xff >> mod;
1936         d_mask = ~(0xff >> mod);
1937         for (i = height; i--; ) {
1938                 for (j = 0; j < w; j++) {
1939                         writeb(0x00, addr + j);
1940                         writeb(*(data++), addr + j+8);
1941                 }
1942                 if (mod) {
1943                         writeb(t_mask, addr + j);
1944                         writeb(*(data++) & d_mask, addr + j+8);
1945                 }
1946                 addr += 16;
1947         }
1948 }
1949
1950 void intelfbhw_cursor_reset(struct intelfb_info *dinfo)
1951 {
1952         u8 __iomem *addr = (u8 __iomem *)dinfo->cursor.virtual;
1953         int i, j;
1954
1955 #if VERBOSE > 0
1956         DBG_MSG("intelfbhw_cursor_reset\n");
1957 #endif
1958
1959         if (!dinfo->cursor.virtual)
1960                 return;
1961
1962         for (i = 64; i--; ) {
1963                 for (j = 0; j < 8; j++) {
1964                         writeb(0xff, addr + j+0);
1965                         writeb(0x00, addr + j+8);
1966                 }
1967                 addr += 16;
1968         }
1969 }
1970
1971 static irqreturn_t intelfbhw_irq(int irq, void *dev_id)
1972 {
1973         u16 tmp;
1974         struct intelfb_info *dinfo = dev_id;
1975
1976         spin_lock(&dinfo->int_lock);
1977
1978         tmp = INREG16(IIR);
1979         if (dinfo->info->var.vmode & FB_VMODE_INTERLACED)
1980                 tmp &= PIPE_A_EVENT_INTERRUPT;
1981         else
1982                 tmp &= VSYNC_PIPE_A_INTERRUPT; /* non-interlaced */
1983
1984         if (tmp == 0) {
1985                 spin_unlock(&dinfo->int_lock);
1986                 return IRQ_RETVAL(0); /* not us */
1987         }
1988
1989         /* clear status bits 0-15 ASAP and don't touch bits 16-31 */
1990         OUTREG(PIPEASTAT, INREG(PIPEASTAT));
1991
1992         OUTREG16(IIR, tmp);
1993         if (dinfo->vsync.pan_display) {
1994                 dinfo->vsync.pan_display = 0;
1995                 OUTREG(DSPABASE, dinfo->vsync.pan_offset);
1996         }
1997
1998         dinfo->vsync.count++;
1999         wake_up_interruptible(&dinfo->vsync.wait);
2000
2001         spin_unlock(&dinfo->int_lock);
2002
2003         return IRQ_RETVAL(1);
2004 }
2005
2006 int intelfbhw_enable_irq(struct intelfb_info *dinfo)
2007 {
2008         u16 tmp;
2009         if (!test_and_set_bit(0, &dinfo->irq_flags)) {
2010                 if (request_irq(dinfo->pdev->irq, intelfbhw_irq, IRQF_SHARED,
2011                                 "intelfb", dinfo)) {
2012                         clear_bit(0, &dinfo->irq_flags);
2013                         return -EINVAL;
2014                 }
2015
2016                 spin_lock_irq(&dinfo->int_lock);
2017                 OUTREG16(HWSTAM, 0xfffe); /* i830 DRM uses ffff */
2018                 OUTREG16(IMR, 0);
2019         } else
2020                 spin_lock_irq(&dinfo->int_lock);
2021
2022         if (dinfo->info->var.vmode & FB_VMODE_INTERLACED)
2023                 tmp = PIPE_A_EVENT_INTERRUPT;
2024         else
2025                 tmp = VSYNC_PIPE_A_INTERRUPT; /* non-interlaced */
2026         if (tmp != INREG16(IER)) {
2027                 DBG_MSG("changing IER to 0x%X\n", tmp);
2028                 OUTREG16(IER, tmp);
2029         }
2030
2031         spin_unlock_irq(&dinfo->int_lock);
2032         return 0;
2033 }
2034
2035 void intelfbhw_disable_irq(struct intelfb_info *dinfo)
2036 {
2037         if (test_and_clear_bit(0, &dinfo->irq_flags)) {
2038                 if (dinfo->vsync.pan_display) {
2039                         dinfo->vsync.pan_display = 0;
2040                         OUTREG(DSPABASE, dinfo->vsync.pan_offset);
2041                 }
2042                 spin_lock_irq(&dinfo->int_lock);
2043                 OUTREG16(HWSTAM, 0xffff);
2044                 OUTREG16(IMR, 0xffff);
2045                 OUTREG16(IER, 0x0);
2046
2047                 OUTREG16(IIR, INREG16(IIR)); /* clear IRQ requests */
2048                 spin_unlock_irq(&dinfo->int_lock);
2049
2050                 free_irq(dinfo->pdev->irq, dinfo);
2051         }
2052 }
2053
2054 int intelfbhw_wait_for_vsync(struct intelfb_info *dinfo, u32 pipe)
2055 {
2056         struct intelfb_vsync *vsync;
2057         unsigned int count;
2058         int ret;
2059
2060         switch (pipe) {
2061                 case 0:
2062                         vsync = &dinfo->vsync;
2063                         break;
2064                 default:
2065                         return -ENODEV;
2066         }
2067
2068         ret = intelfbhw_enable_irq(dinfo);
2069         if (ret)
2070                 return ret;
2071
2072         count = vsync->count;
2073         ret = wait_event_interruptible_timeout(vsync->wait,
2074                                                count != vsync->count, HZ / 10);
2075         if (ret < 0)
2076                 return ret;
2077         if (ret == 0) {
2078                 DBG_MSG("wait_for_vsync timed out!\n");
2079                 return -ETIMEDOUT;
2080         }
2081
2082         return 0;
2083 }