kernel/drivers/video/fbdev/vermilion/vermilion.c

   1 /*
   2  * Copyright (c) Intel Corp. 2007.
   3  * All Rights Reserved.
   4  *
   5  * Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
   6  * develop this driver.
   7  *
   8  * This file is part of the Vermilion Range fb driver.
   9  * The Vermilion Range fb driver is free software;
  10  * you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * The Vermilion Range fb driver is distributed
  16  * in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this driver; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  24  *
  25  * Authors:
  26  *   Thomas Hellström <thomas-at-tungstengraphics-dot-com>
  27  *   Michel Dänzer <michel-at-tungstengraphics-dot-com>
  28  *   Alan Hourihane <alanh-at-tungstengraphics-dot-com>
  29  */
  30
  31 #include <linux/module.h>
  32 #include <linux/kernel.h>
  33 #include <linux/errno.h>
  34 #include <linux/string.h>
  35 #include <linux/delay.h>
  36 #include <linux/slab.h>
  37 #include <linux/mm.h>
  38 #include <linux/fb.h>
  39 #include <linux/pci.h>
  40 #include <asm/cacheflush.h>
  41 #include <asm/tlbflush.h>
  42 #include <linux/mmzone.h>
  43
  44 /* #define VERMILION_DEBUG */
  45
  46 #include "vermilion.h"
  47
  48 #define MODULE_NAME "vmlfb"
  49
  50 #define VML_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16)
  51
  52 static struct mutex vml_mutex;
  53 static struct list_head global_no_mode;
  54 static struct list_head global_has_mode;
  55 static struct fb_ops vmlfb_ops;
  56 static struct vml_sys *subsys = NULL;
  57 static char *vml_default_mode = "1024x768@60";
  58 static struct fb_videomode defaultmode = {
  59         NULL, 60, 1024, 768, 12896, 144, 24, 29, 3, 136, 6,
  60         0, FB_VMODE_NONINTERLACED
  61 };
  62
  63 static u32 vml_mem_requested = (10 * 1024 * 1024);
  64 static u32 vml_mem_contig = (4 * 1024 * 1024);
  65 static u32 vml_mem_min = (4 * 1024 * 1024);
  66
  67 static u32 vml_clocks[] = {
  68         6750,
  69         13500,
  70         27000,
  71         29700,
  72         37125,
  73         54000,
  74         59400,
  75         74250,
  76         120000,
  77         148500
  78 };
  79
  80 static u32 vml_num_clocks = ARRAY_SIZE(vml_clocks);
  81
  82 /*
  83  * Allocate a contiguous vram area and make its linear kernel map
  84  * uncached.
  85  */
  86
  87 static int vmlfb_alloc_vram_area(struct vram_area *va, unsigned max_order,
  88                                  unsigned min_order)
  89 {
  90         gfp_t flags;
  91         unsigned long i;
  92
  93         max_order++;
  94         do {
  95                 /*
  96                  * Really try hard to get the needed memory.
  97                  * We need memory below the first 32MB, so we
  98                  * add the __GFP_DMA flag that guarantees that we are
  99                  * below the first 16MB.
 100                  */
 101
 102                 flags = __GFP_DMA | __GFP_HIGH;
 103                 va->logical =
 104                          __get_free_pages(flags, --max_order);
 105         } while (va->logical == 0 && max_order > min_order);
 106
 107         if (!va->logical)
 108                 return -ENOMEM;
 109
 110         va->phys = virt_to_phys((void *)va->logical);
 111         va->size = PAGE_SIZE << max_order;
 112         va->order = max_order;
 113
 114         /*
 115          * It seems like __get_free_pages only ups the usage count
 116          * of the first page. This doesn't work with fault mapping, so
 117          * up the usage count once more (XXX: should use split_page or
 118          * compound page).
 119          */
 120
 121         memset((void *)va->logical, 0x00, va->size);
 122         for (i = va->logical; i < va->logical + va->size; i += PAGE_SIZE) {
 123                 get_page(virt_to_page(i));
 124         }
 125
 126         /*
 127          * Change caching policy of the linear kernel map to avoid
 128          * mapping type conflicts with user-space mappings.
 129          */
 130         set_pages_uc(virt_to_page(va->logical), va->size >> PAGE_SHIFT);
 131
 132         printk(KERN_DEBUG MODULE_NAME
 133                ": Allocated %ld bytes vram area at 0x%08lx\n",
 134                va->size, va->phys);
 135
 136         return 0;
 137 }
 138
 139 /*
 140  * Free a contiguous vram area and reset its linear kernel map
 141  * mapping type.
 142  */
 143
 144 static void vmlfb_free_vram_area(struct vram_area *va)
 145 {
 146         unsigned long j;
 147
 148         if (va->logical) {
 149
 150                 /*
 151                  * Reset the linear kernel map caching policy.
 152                  */
 153
 154                 set_pages_wb(virt_to_page(va->logical),
 155                                  va->size >> PAGE_SHIFT);
 156
 157                 /*
 158                  * Decrease the usage count on the pages we've used
 159                  * to compensate for upping when allocating.
 160                  */
 161
 162                 for (j = va->logical; j < va->logical + va->size;
 163                      j += PAGE_SIZE) {
 164                         (void)put_page_testzero(virt_to_page(j));
 165                 }
 166
 167                 printk(KERN_DEBUG MODULE_NAME
 168                        ": Freeing %ld bytes vram area at 0x%08lx\n",
 169                        va->size, va->phys);
 170                 free_pages(va->logical, va->order);
 171
 172                 va->logical = 0;
 173         }
 174 }
 175
 176 /*
 177  * Free allocated vram.
 178  */
 179
 180 static void vmlfb_free_vram(struct vml_info *vinfo)
 181 {
 182         int i;
 183
 184         for (i = 0; i < vinfo->num_areas; ++i) {
 185                 vmlfb_free_vram_area(&vinfo->vram[i]);
 186         }
 187         vinfo->num_areas = 0;
 188 }
 189
 190 /*
 191  * Allocate vram. Currently we try to allocate contiguous areas from the
 192  * __GFP_DMA zone and puzzle them together. A better approach would be to
 193  * allocate one contiguous area for scanout and use one-page allocations for
 194  * offscreen areas. This requires user-space and GPU virtual mappings.
 195  */
 196
 197 static int vmlfb_alloc_vram(struct vml_info *vinfo,
 198                             size_t requested,
 199                             size_t min_total, size_t min_contig)
 200 {
 201         int i, j;
 202         int order;
 203         int contiguous;
 204         int err;
 205         struct vram_area *va;
 206         struct vram_area *va2;
 207
 208         vinfo->num_areas = 0;
 209         for (i = 0; i < VML_VRAM_AREAS; ++i) {
 210                 va = &vinfo->vram[i];
 211                 order = 0;
 212
 213                 while (requested > (PAGE_SIZE << order) && order < MAX_ORDER)
 214                         order++;
 215
 216                 err = vmlfb_alloc_vram_area(va, order, 0);
 217
 218                 if (err)
 219                         break;
 220
 221                 if (i == 0) {
 222                         vinfo->vram_start = va->phys;
 223                         vinfo->vram_logical = (void __iomem *) va->logical;
 224                         vinfo->vram_contig_size = va->size;
 225                         vinfo->num_areas = 1;
 226                 } else {
 227                         contiguous = 0;
 228
 229                         for (j = 0; j < i; ++j) {
 230                                 va2 = &vinfo->vram[j];
 231                                 if (va->phys + va->size == va2->phys ||
 232                                     va2->phys + va2->size == va->phys) {
 233                                         contiguous = 1;
 234                                         break;
 235                                 }
 236                         }
 237
 238                         if (contiguous) {
 239                                 vinfo->num_areas++;
 240                                 if (va->phys < vinfo->vram_start) {
 241                                         vinfo->vram_start = va->phys;
 242                                         vinfo->vram_logical =
 243                                                 (void __iomem *)va->logical;
 244                                 }
 245                                 vinfo->vram_contig_size += va->size;
 246                         } else {
 247                                 vmlfb_free_vram_area(va);
 248                                 break;
 249                         }
 250                 }
 251
 252                 if (requested < va->size)
 253                         break;
 254                 else
 255                         requested -= va->size;
 256         }
 257
 258         if (vinfo->vram_contig_size > min_total &&
 259             vinfo->vram_contig_size > min_contig) {
 260
 261                 printk(KERN_DEBUG MODULE_NAME
 262                        ": Contiguous vram: %ld bytes at physical 0x%08lx.\n",
 263                        (unsigned long)vinfo->vram_contig_size,
 264                        (unsigned long)vinfo->vram_start);
 265
 266                 return 0;
 267         }
 268
 269         printk(KERN_ERR MODULE_NAME
 270                ": Could not allocate requested minimal amount of vram.\n");
 271
 272         vmlfb_free_vram(vinfo);
 273
 274         return -ENOMEM;
 275 }
 276
 277 /*
 278  * Find the GPU to use with our display controller.
 279  */
 280
 281 static int vmlfb_get_gpu(struct vml_par *par)
 282 {
 283         mutex_lock(&vml_mutex);
 284
 285         par->gpu = pci_get_device(PCI_VENDOR_ID_INTEL, VML_DEVICE_GPU, NULL);
 286
 287         if (!par->gpu) {
 288                 mutex_unlock(&vml_mutex);
 289                 return -ENODEV;
 290         }
 291
 292         mutex_unlock(&vml_mutex);
 293
 294         if (pci_enable_device(par->gpu) < 0)
 295                 return -ENODEV;
 296
 297         return 0;
 298 }
 299
 300 /*
 301  * Find a contiguous vram area that contains a given offset from vram start.
 302  */
 303 static int vmlfb_vram_offset(struct vml_info *vinfo, unsigned long offset)
 304 {
 305         unsigned long aoffset;
 306         unsigned i;
 307
 308         for (i = 0; i < vinfo->num_areas; ++i) {
 309                 aoffset = offset - (vinfo->vram[i].phys - vinfo->vram_start);
 310
 311                 if (aoffset < vinfo->vram[i].size) {
 312                         return 0;
 313                 }
 314         }
 315
 316         return -EINVAL;
 317 }
 318
 319 /*
 320  * Remap the MMIO register spaces of the VDC and the GPU.
 321  */
 322
 323 static int vmlfb_enable_mmio(struct vml_par *par)
 324 {
 325         int err;
 326
 327         par->vdc_mem_base = pci_resource_start(par->vdc, 0);
 328         par->vdc_mem_size = pci_resource_len(par->vdc, 0);
 329         if (!request_mem_region(par->vdc_mem_base, par->vdc_mem_size, "vmlfb")) {
 330                 printk(KERN_ERR MODULE_NAME
 331                        ": Could not claim display controller MMIO.\n");
 332                 return -EBUSY;
 333         }
 334         par->vdc_mem = ioremap_nocache(par->vdc_mem_base, par->vdc_mem_size);
 335         if (par->vdc_mem == NULL) {
 336                 printk(KERN_ERR MODULE_NAME
 337                        ": Could not map display controller MMIO.\n");
 338                 err = -ENOMEM;
 339                 goto out_err_0;
 340         }
 341
 342         par->gpu_mem_base = pci_resource_start(par->gpu, 0);
 343         par->gpu_mem_size = pci_resource_len(par->gpu, 0);
 344         if (!request_mem_region(par->gpu_mem_base, par->gpu_mem_size, "vmlfb")) {
 345                 printk(KERN_ERR MODULE_NAME ": Could not claim GPU MMIO.\n");
 346                 err = -EBUSY;
 347                 goto out_err_1;
 348         }
 349         par->gpu_mem = ioremap_nocache(par->gpu_mem_base, par->gpu_mem_size);
 350         if (par->gpu_mem == NULL) {
 351                 printk(KERN_ERR MODULE_NAME ": Could not map GPU MMIO.\n");
 352                 err = -ENOMEM;
 353                 goto out_err_2;
 354         }
 355
 356         return 0;
 357
 358 out_err_2:
 359         release_mem_region(par->gpu_mem_base, par->gpu_mem_size);
 360 out_err_1:
 361         iounmap(par->vdc_mem);
 362 out_err_0:
 363         release_mem_region(par->vdc_mem_base, par->vdc_mem_size);
 364         return err;
 365 }
 366
 367 /*
 368  * Unmap the VDC and GPU register spaces.
 369  */
 370
 371 static void vmlfb_disable_mmio(struct vml_par *par)
 372 {
 373         iounmap(par->gpu_mem);
 374         release_mem_region(par->gpu_mem_base, par->gpu_mem_size);
 375         iounmap(par->vdc_mem);
 376         release_mem_region(par->vdc_mem_base, par->vdc_mem_size);
 377 }
 378
 379 /*
 380  * Release and uninit the VDC and GPU.
 381  */
 382
 383 static void vmlfb_release_devices(struct vml_par *par)
 384 {
 385         if (atomic_dec_and_test(&par->refcount)) {
 386                 pci_disable_device(par->gpu);
 387                 pci_disable_device(par->vdc);
 388         }
 389 }
 390
 391 /*
 392  * Free up allocated resources for a device.
 393  */
 394
 395 static void vml_pci_remove(struct pci_dev *dev)
 396 {
 397         struct fb_info *info;
 398         struct vml_info *vinfo;
 399         struct vml_par *par;
 400
 401         info = pci_get_drvdata(dev);
 402         if (info) {
 403                 vinfo = container_of(info, struct vml_info, info);
 404                 par = vinfo->par;
 405                 mutex_lock(&vml_mutex);
 406                 unregister_framebuffer(info);
 407                 fb_dealloc_cmap(&info->cmap);
 408                 vmlfb_free_vram(vinfo);
 409                 vmlfb_disable_mmio(par);
 410                 vmlfb_release_devices(par);
 411                 kfree(vinfo);
 412                 kfree(par);
 413                 mutex_unlock(&vml_mutex);
 414         }
 415 }
 416
 417 static void vmlfb_set_pref_pixel_format(struct fb_var_screeninfo *var)
 418 {
 419         switch (var->bits_per_pixel) {
 420         case 16:
 421                 var->blue.offset = 0;
 422                 var->blue.length = 5;
 423                 var->green.offset = 5;
 424                 var->green.length = 5;
 425                 var->red.offset = 10;
 426                 var->red.length = 5;
 427                 var->transp.offset = 15;
 428                 var->transp.length = 1;
 429                 break;
 430         case 32:
 431                 var->blue.offset = 0;
 432                 var->blue.length = 8;
 433                 var->green.offset = 8;
 434                 var->green.length = 8;
 435                 var->red.offset = 16;
 436                 var->red.length = 8;
 437                 var->transp.offset = 24;
 438                 var->transp.length = 0;
 439                 break;
 440         default:
 441                 break;
 442         }
 443
 444         var->blue.msb_right = var->green.msb_right =
 445             var->red.msb_right = var->transp.msb_right = 0;
 446 }
 447
 448 /*
 449  * Device initialization.
 450  * We initialize one vml_par struct per device and one vml_info
 451  * struct per pipe. Currently we have only one pipe.
 452  */
 453
 454 static int vml_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 455 {
 456         struct vml_info *vinfo;
 457         struct fb_info *info;
 458         struct vml_par *par;
 459         int err = 0;
 460
 461         par = kzalloc(sizeof(*par), GFP_KERNEL);
 462         if (par == NULL)
 463                 return -ENOMEM;
 464
 465         vinfo = kzalloc(sizeof(*vinfo), GFP_KERNEL);
 466         if (vinfo == NULL) {
 467                 err = -ENOMEM;
 468                 goto out_err_0;
 469         }
 470
 471         vinfo->par = par;
 472         par->vdc = dev;
 473         atomic_set(&par->refcount, 1);
 474
 475         switch (id->device) {
 476         case VML_DEVICE_VDC:
 477                 if ((err = vmlfb_get_gpu(par)))
 478                         goto out_err_1;
 479                 pci_set_drvdata(dev, &vinfo->info);
 480                 break;
 481         default:
 482                 err = -ENODEV;
 483                 goto out_err_1;
 484         }
 485
 486         info = &vinfo->info;
 487         info->flags = FBINFO_DEFAULT | FBINFO_PARTIAL_PAN_OK;
 488
 489         err = vmlfb_enable_mmio(par);
 490         if (err)
 491                 goto out_err_2;
 492
 493         err = vmlfb_alloc_vram(vinfo, vml_mem_requested,
 494                                vml_mem_contig, vml_mem_min);
 495         if (err)
 496                 goto out_err_3;
 497
 498         strcpy(info->fix.id, "Vermilion Range");
 499         info->fix.mmio_start = 0;
 500         info->fix.mmio_len = 0;
 501         info->fix.smem_start = vinfo->vram_start;
 502         info->fix.smem_len = vinfo->vram_contig_size;
 503         info->fix.type = FB_TYPE_PACKED_PIXELS;
 504         info->fix.visual = FB_VISUAL_TRUECOLOR;
 505         info->fix.ypanstep = 1;
 506         info->fix.xpanstep = 1;
 507         info->fix.ywrapstep = 0;
 508         info->fix.accel = FB_ACCEL_NONE;
 509         info->screen_base = vinfo->vram_logical;
 510         info->pseudo_palette = vinfo->pseudo_palette;
 511         info->par = par;
 512         info->fbops = &vmlfb_ops;
 513         info->device = &dev->dev;
 514
 515         INIT_LIST_HEAD(&vinfo->head);
 516         vinfo->pipe_disabled = 1;
 517         vinfo->cur_blank_mode = FB_BLANK_UNBLANK;
 518
 519         info->var.grayscale = 0;
 520         info->var.bits_per_pixel = 16;
 521         vmlfb_set_pref_pixel_format(&info->var);
 522
 523         if (!fb_find_mode
 524             (&info->var, info, vml_default_mode, NULL, 0, &defaultmode, 16)) {
 525                 printk(KERN_ERR MODULE_NAME ": Could not find initial mode\n");
 526         }
 527
 528         if (fb_alloc_cmap(&info->cmap, 256, 1) < 0) {
 529                 err = -ENOMEM;
 530                 goto out_err_4;
 531         }
 532
 533         err = register_framebuffer(info);
 534         if (err) {
 535                 printk(KERN_ERR MODULE_NAME ": Register framebuffer error.\n");
 536                 goto out_err_5;
 537         }
 538
 539         printk("Initialized vmlfb\n");
 540
 541         return 0;
 542
 543 out_err_5:
 544         fb_dealloc_cmap(&info->cmap);
 545 out_err_4:
 546         vmlfb_free_vram(vinfo);
 547 out_err_3:
 548         vmlfb_disable_mmio(par);
 549 out_err_2:
 550         vmlfb_release_devices(par);
 551 out_err_1:
 552         kfree(vinfo);
 553 out_err_0:
 554         kfree(par);
 555         return err;
 556 }
 557
 558 static int vmlfb_open(struct fb_info *info, int user)
 559 {
 560         /*
 561          * Save registers here?
 562          */
 563         return 0;
 564 }
 565
 566 static int vmlfb_release(struct fb_info *info, int user)
 567 {
 568         /*
 569          * Restore registers here.
 570          */
 571
 572         return 0;
 573 }
 574
 575 static int vml_nearest_clock(int clock)
 576 {
 577
 578         int i;
 579         int cur_index;
 580         int cur_diff;
 581         int diff;
 582
 583         cur_index = 0;
 584         cur_diff = clock - vml_clocks[0];
 585         cur_diff = (cur_diff < 0) ? -cur_diff : cur_diff;
 586         for (i = 1; i < vml_num_clocks; ++i) {
 587                 diff = clock - vml_clocks[i];
 588                 diff = (diff < 0) ? -diff : diff;
 589                 if (diff < cur_diff) {
 590                         cur_index = i;
 591                         cur_diff = diff;
 592                 }
 593         }
 594         return vml_clocks[cur_index];
 595 }
 596
 597 static int vmlfb_check_var_locked(struct fb_var_screeninfo *var,
 598                                   struct vml_info *vinfo)
 599 {
 600         u32 pitch;
 601         u64 mem;
 602         int nearest_clock;
 603         int clock;
 604         int clock_diff;
 605         struct fb_var_screeninfo v;
 606
 607         v = *var;
 608         clock = PICOS2KHZ(var->pixclock);
 609
 610         if (subsys && subsys->nearest_clock) {
 611                 nearest_clock = subsys->nearest_clock(subsys, clock);
 612         } else {
 613                 nearest_clock = vml_nearest_clock(clock);
 614         }
 615
 616         /*
 617          * Accept a 20% diff.
 618          */
 619
 620         clock_diff = nearest_clock - clock;
 621         clock_diff = (clock_diff < 0) ? -clock_diff : clock_diff;
 622         if (clock_diff > clock / 5) {
 623 #if 0
 624                 printk(KERN_DEBUG MODULE_NAME ": Diff failure. %d %d\n",clock_diff,clock);
 625 #endif
 626                 return -EINVAL;
 627         }
 628
 629         v.pixclock = KHZ2PICOS(nearest_clock);
 630
 631         if (var->xres > VML_MAX_XRES || var->yres > VML_MAX_YRES) {
 632                 printk(KERN_DEBUG MODULE_NAME ": Resolution failure.\n");
 633                 return -EINVAL;
 634         }
 635         if (var->xres_virtual > VML_MAX_XRES_VIRTUAL) {
 636                 printk(KERN_DEBUG MODULE_NAME
 637                        ": Virtual resolution failure.\n");
 638                 return -EINVAL;
 639         }
 640         switch (v.bits_per_pixel) {
 641         case 0 ... 16:
 642                 v.bits_per_pixel = 16;
 643                 break;
 644         case 17 ... 32:
 645                 v.bits_per_pixel = 32;
 646                 break;
 647         default:
 648                 printk(KERN_DEBUG MODULE_NAME ": Invalid bpp: %d.\n",
 649                        var->bits_per_pixel);
 650                 return -EINVAL;
 651         }
 652
 653         pitch = ALIGN((var->xres * var->bits_per_pixel) >> 3, 0x40);
 654         mem = pitch * var->yres_virtual;
 655         if (mem > vinfo->vram_contig_size) {
 656                 return -ENOMEM;
 657         }
 658
 659         switch (v.bits_per_pixel) {
 660         case 16:
 661                 if (var->blue.offset != 0 ||
 662                     var->blue.length != 5 ||
 663                     var->green.offset != 5 ||
 664                     var->green.length != 5 ||
 665                     var->red.offset != 10 ||
 666                     var->red.length != 5 ||
 667                     var->transp.offset != 15 || var->transp.length != 1) {
 668                         vmlfb_set_pref_pixel_format(&v);
 669                 }
 670                 break;
 671         case 32:
 672                 if (var->blue.offset != 0 ||
 673                     var->blue.length != 8 ||
 674                     var->green.offset != 8 ||
 675                     var->green.length != 8 ||
 676                     var->red.offset != 16 ||
 677                     var->red.length != 8 ||
 678                     (var->transp.length != 0 && var->transp.length != 8) ||
 679                     (var->transp.length == 8 && var->transp.offset != 24)) {
 680                         vmlfb_set_pref_pixel_format(&v);
 681                 }
 682                 break;
 683         default:
 684                 return -EINVAL;
 685         }
 686
 687         *var = v;
 688
 689         return 0;
 690 }
 691
 692 static int vmlfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 693 {
 694         struct vml_info *vinfo = container_of(info, struct vml_info, info);
 695         int ret;
 696
 697         mutex_lock(&vml_mutex);
 698         ret = vmlfb_check_var_locked(var, vinfo);
 699         mutex_unlock(&vml_mutex);
 700
 701         return ret;
 702 }
 703
 704 static void vml_wait_vblank(struct vml_info *vinfo)
 705 {
 706         /* Wait for vblank. For now, just wait for a 50Hz cycle (20ms)) */
 707         mdelay(20);
 708 }
 709
 710 static void vmlfb_disable_pipe(struct vml_info *vinfo)
 711 {
 712         struct vml_par *par = vinfo->par;
 713
 714         /* Disable the MDVO pad */
 715         VML_WRITE32(par, VML_RCOMPSTAT, 0);
 716         while (!(VML_READ32(par, VML_RCOMPSTAT) & VML_MDVO_VDC_I_RCOMP)) ;
 717
 718         /* Disable display planes */
 719         VML_WRITE32(par, VML_DSPCCNTR,
 720                     VML_READ32(par, VML_DSPCCNTR) & ~VML_GFX_ENABLE);
 721         (void)VML_READ32(par, VML_DSPCCNTR);
 722         /* Wait for vblank for the disable to take effect */
 723         vml_wait_vblank(vinfo);
 724
 725         /* Next, disable display pipes */
 726         VML_WRITE32(par, VML_PIPEACONF, 0);
 727         (void)VML_READ32(par, VML_PIPEACONF);
 728
 729         vinfo->pipe_disabled = 1;
 730 }
 731
 732 #ifdef VERMILION_DEBUG
 733 static void vml_dump_regs(struct vml_info *vinfo)
 734 {
 735         struct vml_par *par = vinfo->par;
 736
 737         printk(KERN_DEBUG MODULE_NAME ": Modesetting register dump:\n");
 738         printk(KERN_DEBUG MODULE_NAME ": \tHTOTAL_A         : 0x%08x\n",
 739                (unsigned)VML_READ32(par, VML_HTOTAL_A));
 740         printk(KERN_DEBUG MODULE_NAME ": \tHBLANK_A         : 0x%08x\n",
 741                (unsigned)VML_READ32(par, VML_HBLANK_A));
 742         printk(KERN_DEBUG MODULE_NAME ": \tHSYNC_A          : 0x%08x\n",
 743                (unsigned)VML_READ32(par, VML_HSYNC_A));
 744         printk(KERN_DEBUG MODULE_NAME ": \tVTOTAL_A         : 0x%08x\n",
 745                (unsigned)VML_READ32(par, VML_VTOTAL_A));
 746         printk(KERN_DEBUG MODULE_NAME ": \tVBLANK_A         : 0x%08x\n",
 747                (unsigned)VML_READ32(par, VML_VBLANK_A));
 748         printk(KERN_DEBUG MODULE_NAME ": \tVSYNC_A          : 0x%08x\n",
 749                (unsigned)VML_READ32(par, VML_VSYNC_A));
 750         printk(KERN_DEBUG MODULE_NAME ": \tDSPCSTRIDE       : 0x%08x\n",
 751                (unsigned)VML_READ32(par, VML_DSPCSTRIDE));
 752         printk(KERN_DEBUG MODULE_NAME ": \tDSPCSIZE         : 0x%08x\n",
 753                (unsigned)VML_READ32(par, VML_DSPCSIZE));
 754         printk(KERN_DEBUG MODULE_NAME ": \tDSPCPOS          : 0x%08x\n",
 755                (unsigned)VML_READ32(par, VML_DSPCPOS));
 756         printk(KERN_DEBUG MODULE_NAME ": \tDSPARB           : 0x%08x\n",
 757                (unsigned)VML_READ32(par, VML_DSPARB));
 758         printk(KERN_DEBUG MODULE_NAME ": \tDSPCADDR         : 0x%08x\n",
 759                (unsigned)VML_READ32(par, VML_DSPCADDR));
 760         printk(KERN_DEBUG MODULE_NAME ": \tBCLRPAT_A        : 0x%08x\n",
 761                (unsigned)VML_READ32(par, VML_BCLRPAT_A));
 762         printk(KERN_DEBUG MODULE_NAME ": \tCANVSCLR_A       : 0x%08x\n",
 763                (unsigned)VML_READ32(par, VML_CANVSCLR_A));
 764         printk(KERN_DEBUG MODULE_NAME ": \tPIPEASRC         : 0x%08x\n",
 765                (unsigned)VML_READ32(par, VML_PIPEASRC));
 766         printk(KERN_DEBUG MODULE_NAME ": \tPIPEACONF        : 0x%08x\n",
 767                (unsigned)VML_READ32(par, VML_PIPEACONF));
 768         printk(KERN_DEBUG MODULE_NAME ": \tDSPCCNTR         : 0x%08x\n",
 769                (unsigned)VML_READ32(par, VML_DSPCCNTR));
 770         printk(KERN_DEBUG MODULE_NAME ": \tRCOMPSTAT        : 0x%08x\n",
 771                (unsigned)VML_READ32(par, VML_RCOMPSTAT));
 772         printk(KERN_DEBUG MODULE_NAME ": End of modesetting register dump.\n");
 773 }
 774 #endif
 775
 776 static int vmlfb_set_par_locked(struct vml_info *vinfo)
 777 {
 778         struct vml_par *par = vinfo->par;
 779         struct fb_info *info = &vinfo->info;
 780         struct fb_var_screeninfo *var = &info->var;
 781         u32 htotal, hactive, hblank_start, hblank_end, hsync_start, hsync_end;
 782         u32 vtotal, vactive, vblank_start, vblank_end, vsync_start, vsync_end;
 783         u32 dspcntr;
 784         int clock;
 785
 786         vinfo->bytes_per_pixel = var->bits_per_pixel >> 3;
 787         vinfo->stride = ALIGN(var->xres_virtual * vinfo->bytes_per_pixel, 0x40);
 788         info->fix.line_length = vinfo->stride;
 789
 790         if (!subsys)
 791                 return 0;
 792
 793         htotal =
 794             var->xres + var->right_margin + var->hsync_len + var->left_margin;
 795         hactive = var->xres;
 796         hblank_start = var->xres;
 797         hblank_end = htotal;
 798         hsync_start = hactive + var->right_margin;
 799         hsync_end = hsync_start + var->hsync_len;
 800
 801         vtotal =
 802             var->yres + var->lower_margin + var->vsync_len + var->upper_margin;
 803         vactive = var->yres;
 804         vblank_start = var->yres;
 805         vblank_end = vtotal;
 806         vsync_start = vactive + var->lower_margin;
 807         vsync_end = vsync_start + var->vsync_len;
 808
 809         dspcntr = VML_GFX_ENABLE | VML_GFX_GAMMABYPASS;
 810         clock = PICOS2KHZ(var->pixclock);
 811
 812         if (subsys->nearest_clock) {
 813                 clock = subsys->nearest_clock(subsys, clock);
 814         } else {
 815                 clock = vml_nearest_clock(clock);
 816         }
 817         printk(KERN_DEBUG MODULE_NAME
 818                ": Set mode Hfreq : %d kHz, Vfreq : %d Hz.\n", clock / htotal,
 819                ((clock / htotal) * 1000) / vtotal);
 820
 821         switch (var->bits_per_pixel) {
 822         case 16:
 823                 dspcntr |= VML_GFX_ARGB1555;
 824                 break;
 825         case 32:
 826                 if (var->transp.length == 8)
 827                         dspcntr |= VML_GFX_ARGB8888 | VML_GFX_ALPHAMULT;
 828                 else
 829                         dspcntr |= VML_GFX_RGB0888;
 830                 break;
 831         default:
 832                 return -EINVAL;
 833         }
 834
 835         vmlfb_disable_pipe(vinfo);
 836         mb();
 837
 838         if (subsys->set_clock)
 839                 subsys->set_clock(subsys, clock);
 840         else
 841                 return -EINVAL;
 842
 843         VML_WRITE32(par, VML_HTOTAL_A, ((htotal - 1) << 16) | (hactive - 1));
 844         VML_WRITE32(par, VML_HBLANK_A,
 845                     ((hblank_end - 1) << 16) | (hblank_start - 1));
 846         VML_WRITE32(par, VML_HSYNC_A,
 847                     ((hsync_end - 1) << 16) | (hsync_start - 1));
 848         VML_WRITE32(par, VML_VTOTAL_A, ((vtotal - 1) << 16) | (vactive - 1));
 849         VML_WRITE32(par, VML_VBLANK_A,
 850                     ((vblank_end - 1) << 16) | (vblank_start - 1));
 851         VML_WRITE32(par, VML_VSYNC_A,
 852                     ((vsync_end - 1) << 16) | (vsync_start - 1));
 853         VML_WRITE32(par, VML_DSPCSTRIDE, vinfo->stride);
 854         VML_WRITE32(par, VML_DSPCSIZE,
 855                     ((var->yres - 1) << 16) | (var->xres - 1));
 856         VML_WRITE32(par, VML_DSPCPOS, 0x00000000);
 857         VML_WRITE32(par, VML_DSPARB, VML_FIFO_DEFAULT);
 858         VML_WRITE32(par, VML_BCLRPAT_A, 0x00000000);
 859         VML_WRITE32(par, VML_CANVSCLR_A, 0x00000000);
 860         VML_WRITE32(par, VML_PIPEASRC,
 861                     ((var->xres - 1) << 16) | (var->yres - 1));
 862
 863         wmb();
 864         VML_WRITE32(par, VML_PIPEACONF, VML_PIPE_ENABLE);
 865         wmb();
 866         VML_WRITE32(par, VML_DSPCCNTR, dspcntr);
 867         wmb();
 868         VML_WRITE32(par, VML_DSPCADDR, (u32) vinfo->vram_start +
 869                     var->yoffset * vinfo->stride +
 870                     var->xoffset * vinfo->bytes_per_pixel);
 871
 872         VML_WRITE32(par, VML_RCOMPSTAT, VML_MDVO_PAD_ENABLE);
 873
 874         while (!(VML_READ32(par, VML_RCOMPSTAT) &
 875                  (VML_MDVO_VDC_I_RCOMP | VML_MDVO_PAD_ENABLE))) ;
 876
 877         vinfo->pipe_disabled = 0;
 878 #ifdef VERMILION_DEBUG
 879         vml_dump_regs(vinfo);
 880 #endif
 881
 882         return 0;
 883 }
 884
 885 static int vmlfb_set_par(struct fb_info *info)
 886 {
 887         struct vml_info *vinfo = container_of(info, struct vml_info, info);
 888         int ret;
 889
 890         mutex_lock(&vml_mutex);
 891         list_move(&vinfo->head, (subsys) ? &global_has_mode : &global_no_mode);
 892         ret = vmlfb_set_par_locked(vinfo);
 893
 894         mutex_unlock(&vml_mutex);
 895         return ret;
 896 }
 897
 898 static int vmlfb_blank_locked(struct vml_info *vinfo)
 899 {
 900         struct vml_par *par = vinfo->par;
 901         u32 cur = VML_READ32(par, VML_PIPEACONF);
 902
 903         switch (vinfo->cur_blank_mode) {
 904         case FB_BLANK_UNBLANK:
 905                 if (vinfo->pipe_disabled) {
 906                         vmlfb_set_par_locked(vinfo);
 907                 }
 908                 VML_WRITE32(par, VML_PIPEACONF, cur & ~VML_PIPE_FORCE_BORDER);
 909                 (void)VML_READ32(par, VML_PIPEACONF);
 910                 break;
 911         case FB_BLANK_NORMAL:
 912                 if (vinfo->pipe_disabled) {
 913                         vmlfb_set_par_locked(vinfo);
 914                 }
 915                 VML_WRITE32(par, VML_PIPEACONF, cur | VML_PIPE_FORCE_BORDER);
 916                 (void)VML_READ32(par, VML_PIPEACONF);
 917                 break;
 918         case FB_BLANK_VSYNC_SUSPEND:
 919         case FB_BLANK_HSYNC_SUSPEND:
 920                 if (!vinfo->pipe_disabled) {
 921                         vmlfb_disable_pipe(vinfo);
 922                 }
 923                 break;
 924         case FB_BLANK_POWERDOWN:
 925                 if (!vinfo->pipe_disabled) {
 926                         vmlfb_disable_pipe(vinfo);
 927                 }
 928                 break;
 929         default:
 930                 return -EINVAL;
 931         }
 932
 933         return 0;
 934 }
 935
 936 static int vmlfb_blank(int blank_mode, struct fb_info *info)
 937 {
 938         struct vml_info *vinfo = container_of(info, struct vml_info, info);
 939         int ret;
 940
 941         mutex_lock(&vml_mutex);
 942         vinfo->cur_blank_mode = blank_mode;
 943         ret = vmlfb_blank_locked(vinfo);
 944         mutex_unlock(&vml_mutex);
 945         return ret;
 946 }
 947
 948 static int vmlfb_pan_display(struct fb_var_screeninfo *var,
 949                              struct fb_info *info)
 950 {
 951         struct vml_info *vinfo = container_of(info, struct vml_info, info);
 952         struct vml_par *par = vinfo->par;
 953
 954         mutex_lock(&vml_mutex);
 955         VML_WRITE32(par, VML_DSPCADDR, (u32) vinfo->vram_start +
 956                     var->yoffset * vinfo->stride +
 957                     var->xoffset * vinfo->bytes_per_pixel);
 958         (void)VML_READ32(par, VML_DSPCADDR);
 959         mutex_unlock(&vml_mutex);
 960
 961         return 0;
 962 }
 963
 964 static int vmlfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 965                            u_int transp, struct fb_info *info)
 966 {
 967         u32 v;
 968
 969         if (regno >= 16)
 970                 return -EINVAL;
 971
 972         if (info->var.grayscale) {
 973                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 974         }
 975
 976         if (info->fix.visual != FB_VISUAL_TRUECOLOR)
 977                 return -EINVAL;
 978
 979         red = VML_TOHW(red, info->var.red.length);
 980         blue = VML_TOHW(blue, info->var.blue.length);
 981         green = VML_TOHW(green, info->var.green.length);
 982         transp = VML_TOHW(transp, info->var.transp.length);
 983
 984         v = (red << info->var.red.offset) |
 985             (green << info->var.green.offset) |
 986             (blue << info->var.blue.offset) |
 987             (transp << info->var.transp.offset);
 988
 989         switch (info->var.bits_per_pixel) {
 990         case 16:
 991                 ((u32 *) info->pseudo_palette)[regno] = v;
 992                 break;
 993         case 24:
 994         case 32:
 995                 ((u32 *) info->pseudo_palette)[regno] = v;
 996                 break;
 997         }
 998         return 0;
 999 }
1000
1001 static int vmlfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
1002 {
1003         struct vml_info *vinfo = container_of(info, struct vml_info, info);
1004         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
1005         int ret;
1006         unsigned long prot;
1007
1008         ret = vmlfb_vram_offset(vinfo, offset);
1009         if (ret)
1010                 return -EINVAL;
1011
1012         prot = pgprot_val(vma->vm_page_prot) & ~_PAGE_CACHE_MASK;
1013         pgprot_val(vma->vm_page_prot) =
1014                 prot | cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS);
1015
1016         return vm_iomap_memory(vma, vinfo->vram_start,
1017                         vinfo->vram_contig_size);
1018 }
1019
1020 static int vmlfb_sync(struct fb_info *info)
1021 {
1022         return 0;
1023 }
1024
1025 static int vmlfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1026 {
1027         return -EINVAL; /* just to force soft_cursor() call */
1028 }
1029
1030 static struct fb_ops vmlfb_ops = {
1031         .owner = THIS_MODULE,
1032         .fb_open = vmlfb_open,
1033         .fb_release = vmlfb_release,
1034         .fb_check_var = vmlfb_check_var,
1035         .fb_set_par = vmlfb_set_par,
1036         .fb_blank = vmlfb_blank,
1037         .fb_pan_display = vmlfb_pan_display,
1038         .fb_fillrect = cfb_fillrect,
1039         .fb_copyarea = cfb_copyarea,
1040         .fb_imageblit = cfb_imageblit,
1041         .fb_cursor = vmlfb_cursor,
1042         .fb_sync = vmlfb_sync,
1043         .fb_mmap = vmlfb_mmap,
1044         .fb_setcolreg = vmlfb_setcolreg
1045 };
1046
1047 static struct pci_device_id vml_ids[] = {
1048         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, VML_DEVICE_VDC)},
1049         {0}
1050 };
1051
1052 static struct pci_driver vmlfb_pci_driver = {
1053         .name = "vmlfb",
1054         .id_table = vml_ids,
1055         .probe = vml_pci_probe,
1056         .remove = vml_pci_remove,
1057 };
1058
1059 static void __exit vmlfb_cleanup(void)
1060 {
1061         pci_unregister_driver(&vmlfb_pci_driver);
1062 }
1063
1064 static int __init vmlfb_init(void)
1065 {
1066
1067 #ifndef MODULE
1068         char *option = NULL;
1069
1070         if (fb_get_options(MODULE_NAME, &option))
1071                 return -ENODEV;
1072 #endif
1073
1074         printk(KERN_DEBUG MODULE_NAME ": initializing\n");
1075         mutex_init(&vml_mutex);
1076         INIT_LIST_HEAD(&global_no_mode);
1077         INIT_LIST_HEAD(&global_has_mode);
1078
1079         return pci_register_driver(&vmlfb_pci_driver);
1080 }
1081
1082 int vmlfb_register_subsys(struct vml_sys *sys)
1083 {
1084         struct vml_info *entry;
1085         struct list_head *list;
1086         u32 save_activate;
1087
1088         mutex_lock(&vml_mutex);
1089         if (subsys != NULL) {
1090                 subsys->restore(subsys);
1091         }
1092         subsys = sys;
1093         subsys->save(subsys);
1094
1095         /*
1096          * We need to restart list traversal for each item, since we
1097          * release the list mutex in the loop.
1098          */
1099
1100         list = global_no_mode.next;
1101         while (list != &global_no_mode) {
1102                 list_del_init(list);
1103                 entry = list_entry(list, struct vml_info, head);
1104
1105                 /*
1106                  * First, try the current mode which might not be
1107                  * completely validated with respect to the pixel clock.
1108                  */
1109
1110                 if (!vmlfb_check_var_locked(&entry->info.var, entry)) {
1111                         vmlfb_set_par_locked(entry);
1112                         list_add_tail(list, &global_has_mode);
1113                 } else {
1114
1115                         /*
1116                          * Didn't work. Try to find another mode,
1117                          * that matches this subsys.
1118                          */
1119
1120                         mutex_unlock(&vml_mutex);
1121                         save_activate = entry->info.var.activate;
1122                         entry->info.var.bits_per_pixel = 16;
1123                         vmlfb_set_pref_pixel_format(&entry->info.var);
1124                         if (fb_find_mode(&entry->info.var,
1125                                          &entry->info,
1126                                          vml_default_mode, NULL, 0, NULL, 16)) {
1127                                 entry->info.var.activate |=
1128                                     FB_ACTIVATE_FORCE | FB_ACTIVATE_NOW;
1129                                 fb_set_var(&entry->info, &entry->info.var);
1130                         } else {
1131                                 printk(KERN_ERR MODULE_NAME
1132                                        ": Sorry. no mode found for this subsys.\n");
1133                         }
1134                         entry->info.var.activate = save_activate;
1135                         mutex_lock(&vml_mutex);
1136                 }
1137                 vmlfb_blank_locked(entry);
1138                 list = global_no_mode.next;
1139         }
1140         mutex_unlock(&vml_mutex);
1141
1142         printk(KERN_DEBUG MODULE_NAME ": Registered %s subsystem.\n",
1143                                 subsys->name ? subsys->name : "unknown");
1144         return 0;
1145 }
1146
1147 EXPORT_SYMBOL_GPL(vmlfb_register_subsys);
1148
1149 void vmlfb_unregister_subsys(struct vml_sys *sys)
1150 {
1151         struct vml_info *entry, *next;
1152
1153         mutex_lock(&vml_mutex);
1154         if (subsys != sys) {
1155                 mutex_unlock(&vml_mutex);
1156                 return;
1157         }
1158         subsys->restore(subsys);
1159         subsys = NULL;
1160         list_for_each_entry_safe(entry, next, &global_has_mode, head) {
1161                 printk(KERN_DEBUG MODULE_NAME ": subsys disable pipe\n");
1162                 vmlfb_disable_pipe(entry);
1163                 list_move_tail(&entry->head, &global_no_mode);
1164         }
1165         mutex_unlock(&vml_mutex);
1166 }
1167
1168 EXPORT_SYMBOL_GPL(vmlfb_unregister_subsys);
1169
1170 module_init(vmlfb_init);
1171 module_exit(vmlfb_cleanup);
1172
1173 MODULE_AUTHOR("Tungsten Graphics");
1174 MODULE_DESCRIPTION("Initialization of the Vermilion display devices");
1175 MODULE_VERSION("1.0.0");
1176 MODULE_LICENSE("GPL");