drivers/video/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/mm.h>
  37 #include <linux/fb.h>
  38 #include <linux/pci.h>
  39 #include <asm/cacheflush.h>
  40 #include <asm/tlbflush.h>
  41 #include <linux/mmzone.h>
  42 #include <asm/uaccess.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         pgprot_t wc_pageprot;
  93
  94         wc_pageprot = PAGE_KERNEL_NOCACHE;
  95         max_order++;
  96         do {
  97                 /*
  98                  * Really try hard to get the needed memory.
  99                  * We need memory below the first 32MB, so we
 100                  * add the __GFP_DMA flag that guarantees that we are
 101                  * below the first 16MB.
 102                  */
 103
 104                 flags = __GFP_DMA | __GFP_HIGH;
 105                 va->logical =
 106                          __get_free_pages(flags, --max_order);
 107         } while (va->logical == 0 && max_order > min_order);
 108
 109         if (!va->logical)
 110                 return -ENOMEM;
 111
 112         va->phys = virt_to_phys((void *)va->logical);
 113         va->size = PAGE_SIZE << max_order;
 114         va->order = max_order;
 115
 116         /*
 117          * It seems like __get_free_pages only ups the usage count
 118          * of the first page. This doesn't work with nopage mapping, so
 119          * up the usage count once more.
 120          */
 121
 122         memset((void *)va->logical, 0x00, va->size);
 123         for (i = va->logical; i < va->logical + va->size; i += PAGE_SIZE) {
 124                 get_page(virt_to_page(i));
 125         }
 126
 127         /*
 128          * Change caching policy of the linear kernel map to avoid
 129          * mapping type conflicts with user-space mappings.
 130          * The first global_flush_tlb() is really only there to do a global
 131          * wbinvd().
 132          */
 133
 134         global_flush_tlb();
 135         change_page_attr(virt_to_page(va->logical), va->size >> PAGE_SHIFT,
 136                          wc_pageprot);
 137         global_flush_tlb();
 138
 139         printk(KERN_DEBUG MODULE_NAME
 140                ": Allocated %ld bytes vram area at 0x%08lx\n",
 141                va->size, va->phys);
 142
 143         return 0;
 144 }
 145
 146 /*
 147  * Free a contiguous vram area and reset its linear kernel map
 148  * mapping type.
 149  */
 150
 151 static void vmlfb_free_vram_area(struct vram_area *va)
 152 {
 153         unsigned long j;
 154
 155         if (va->logical) {
 156
 157                 /*
 158                  * Reset the linear kernel map caching policy.
 159                  */
 160
 161                 change_page_attr(virt_to_page(va->logical),
 162                                  va->size >> PAGE_SHIFT, PAGE_KERNEL);
 163                 global_flush_tlb();
 164
 165                 /*
 166                  * Decrease the usage count on the pages we've used
 167                  * to compensate for upping when allocating.
 168                  */
 169
 170                 for (j = va->logical; j < va->logical + va->size;
 171                      j += PAGE_SIZE) {
 172                         (void)put_page_testzero(virt_to_page(j));
 173                 }
 174
 175                 printk(KERN_DEBUG MODULE_NAME
 176                        ": Freeing %ld bytes vram area at 0x%08lx\n",
 177                        va->size, va->phys);
 178                 free_pages(va->logical, va->order);
 179
 180                 va->logical = 0;
 181         }
 182 }
 183
 184 /*
 185  * Free allocated vram.
 186  */
 187
 188 static void vmlfb_free_vram(struct vml_info *vinfo)
 189 {
 190         int i;
 191
 192         for (i = 0; i < vinfo->num_areas; ++i) {
 193                 vmlfb_free_vram_area(&vinfo->vram[i]);
 194         }
 195         vinfo->num_areas = 0;
 196 }
 197
 198 /*
 199  * Allocate vram. Currently we try to allocate contiguous areas from the
 200  * __GFP_DMA zone and puzzle them together. A better approach would be to
 201  * allocate one contiguous area for scanout and use one-page allocations for
 202  * offscreen areas. This requires user-space and GPU virtual mappings.
 203  */
 204
 205 static int vmlfb_alloc_vram(struct vml_info *vinfo,
 206                             size_t requested,
 207                             size_t min_total, size_t min_contig)
 208 {
 209         int i, j;
 210         int order;
 211         int contiguous;
 212         int err;
 213         struct vram_area *va;
 214         struct vram_area *va2;
 215
 216         vinfo->num_areas = 0;
 217         for (i = 0; i < VML_VRAM_AREAS; ++i) {
 218                 va = &vinfo->vram[i];
 219                 order = 0;
 220
 221                 while (requested > (PAGE_SIZE << order) && order < MAX_ORDER)
 222                         order++;
 223
 224                 err = vmlfb_alloc_vram_area(va, order, 0);
 225
 226                 if (err)
 227                         break;
 228
 229                 if (i == 0) {
 230                         vinfo->vram_start = va->phys;
 231                         vinfo->vram_logical = (void __iomem *) va->logical;
 232                         vinfo->vram_contig_size = va->size;
 233                         vinfo->num_areas = 1;
 234                 } else {
 235                         contiguous = 0;
 236
 237                         for (j = 0; j < i; ++j) {
 238                                 va2 = &vinfo->vram[j];
 239                                 if (va->phys + va->size == va2->phys ||
 240                                     va2->phys + va2->size == va->phys) {
 241                                         contiguous = 1;
 242                                         break;
 243                                 }
 244                         }
 245
 246                         if (contiguous) {
 247                                 vinfo->num_areas++;
 248                                 if (va->phys < vinfo->vram_start) {
 249                                         vinfo->vram_start = va->phys;
 250                                         vinfo->vram_logical =
 251                                                 (void __iomem *)va->logical;
 252                                 }
 253                                 vinfo->vram_contig_size += va->size;
 254                         } else {
 255                                 vmlfb_free_vram_area(va);
 256                                 break;
 257                         }
 258                 }
 259
 260                 if (requested < va->size)
 261                         break;
 262                 else
 263                         requested -= va->size;
 264         }
 265
 266         if (vinfo->vram_contig_size > min_total &&
 267             vinfo->vram_contig_size > min_contig) {
 268
 269                 printk(KERN_DEBUG MODULE_NAME
 270                        ": Contiguous vram: %ld bytes at physical 0x%08lx.\n",
 271                        (unsigned long)vinfo->vram_contig_size,
 272                        (unsigned long)vinfo->vram_start);
 273
 274                 return 0;
 275         }
 276
 277         printk(KERN_ERR MODULE_NAME
 278                ": Could not allocate requested minimal amount of vram.\n");
 279
 280         vmlfb_free_vram(vinfo);
 281
 282         return -ENOMEM;
 283 }
 284
 285 /*
 286  * Find the GPU to use with our display controller.
 287  */
 288
 289 static int vmlfb_get_gpu(struct vml_par *par)
 290 {
 291         mutex_lock(&vml_mutex);
 292
 293         par->gpu = pci_get_device(PCI_VENDOR_ID_INTEL, VML_DEVICE_GPU, NULL);
 294
 295         if (!par->gpu) {
 296                 mutex_unlock(&vml_mutex);
 297                 return -ENODEV;
 298         }
 299
 300         mutex_unlock(&vml_mutex);
 301
 302         if (pci_enable_device(par->gpu) < 0)
 303                 return -ENODEV;
 304
 305         return 0;
 306 }
 307
 308 /*
 309  * Find a contiguous vram area that contains a given offset from vram start.
 310  */
 311 static int vmlfb_vram_offset(struct vml_info *vinfo, unsigned long offset)
 312 {
 313         unsigned long aoffset;
 314         unsigned i;
 315
 316         for (i = 0; i < vinfo->num_areas; ++i) {
 317                 aoffset = offset - (vinfo->vram[i].phys - vinfo->vram_start);
 318
 319                 if (aoffset < vinfo->vram[i].size) {
 320                         return 0;
 321                 }
 322         }
 323
 324         return -EINVAL;
 325 }
 326
 327 /*
 328  * Remap the MMIO register spaces of the VDC and the GPU.
 329  */
 330
 331 static int vmlfb_enable_mmio(struct vml_par *par)
 332 {
 333         int err;
 334
 335         par->vdc_mem_base = pci_resource_start(par->vdc, 0);
 336         par->vdc_mem_size = pci_resource_len(par->vdc, 0);
 337         if (!request_mem_region(par->vdc_mem_base, par->vdc_mem_size, "vmlfb")) {
 338                 printk(KERN_ERR MODULE_NAME
 339                        ": Could not claim display controller MMIO.\n");
 340                 return -EBUSY;
 341         }
 342         par->vdc_mem = ioremap_nocache(par->vdc_mem_base, par->vdc_mem_size);
 343         if (par->vdc_mem == NULL) {
 344                 printk(KERN_ERR MODULE_NAME
 345                        ": Could not map display controller MMIO.\n");
 346                 err = -ENOMEM;
 347                 goto out_err_0;
 348         }
 349
 350         par->gpu_mem_base = pci_resource_start(par->gpu, 0);
 351         par->gpu_mem_size = pci_resource_len(par->gpu, 0);
 352         if (!request_mem_region(par->gpu_mem_base, par->gpu_mem_size, "vmlfb")) {
 353                 printk(KERN_ERR MODULE_NAME ": Could not claim GPU MMIO.\n");
 354                 err = -EBUSY;
 355                 goto out_err_1;
 356         }
 357         par->gpu_mem = ioremap_nocache(par->gpu_mem_base, par->gpu_mem_size);
 358         if (par->gpu_mem == NULL) {
 359                 printk(KERN_ERR MODULE_NAME ": Could not map GPU MMIO.\n");
 360                 err = -ENOMEM;
 361                 goto out_err_2;
 362         }
 363
 364         return 0;
 365
 366 out_err_2:
 367         release_mem_region(par->gpu_mem_base, par->gpu_mem_size);
 368 out_err_1:
 369         iounmap(par->vdc_mem);
 370 out_err_0:
 371         release_mem_region(par->vdc_mem_base, par->vdc_mem_size);
 372         return err;
 373 }
 374
 375 /*
 376  * Unmap the VDC and GPU register spaces.
 377  */
 378
 379 static void vmlfb_disable_mmio(struct vml_par *par)
 380 {
 381         iounmap(par->gpu_mem);
 382         release_mem_region(par->gpu_mem_base, par->gpu_mem_size);
 383         iounmap(par->vdc_mem);
 384         release_mem_region(par->vdc_mem_base, par->vdc_mem_size);
 385 }
 386
 387 /*
 388  * Release and uninit the VDC and GPU.
 389  */
 390
 391 static void vmlfb_release_devices(struct vml_par *par)
 392 {
 393         if (atomic_dec_and_test(&par->refcount)) {
 394                 pci_set_drvdata(par->vdc, NULL);
 395                 pci_disable_device(par->gpu);
 396                 pci_disable_device(par->vdc);
 397         }
 398 }
 399
 400 /*
 401  * Free up allocated resources for a device.
 402  */
 403
 404 static void __devexit vml_pci_remove(struct pci_dev *dev)
 405 {
 406         struct fb_info *info;
 407         struct vml_info *vinfo;
 408         struct vml_par *par;
 409
 410         info = pci_get_drvdata(dev);
 411         if (info) {
 412                 vinfo = container_of(info, struct vml_info, info);
 413                 par = vinfo->par;
 414                 mutex_lock(&vml_mutex);
 415                 unregister_framebuffer(info);
 416                 fb_dealloc_cmap(&info->cmap);
 417                 vmlfb_free_vram(vinfo);
 418                 vmlfb_disable_mmio(par);
 419                 vmlfb_release_devices(par);
 420                 kfree(vinfo);
 421                 kfree(par);
 422                 mutex_unlock(&vml_mutex);
 423         }
 424 }
 425
 426 static void vmlfb_set_pref_pixel_format(struct fb_var_screeninfo *var)
 427 {
 428         switch (var->bits_per_pixel) {
 429         case 16:
 430                 var->blue.offset = 0;
 431                 var->blue.length = 5;
 432                 var->green.offset = 5;
 433                 var->green.length = 5;
 434                 var->red.offset = 10;
 435                 var->red.length = 5;
 436                 var->transp.offset = 15;
 437                 var->transp.length = 1;
 438                 break;
 439         case 32:
 440                 var->blue.offset = 0;
 441                 var->blue.length = 8;
 442                 var->green.offset = 8;
 443                 var->green.length = 8;
 444                 var->red.offset = 16;
 445                 var->red.length = 8;
 446                 var->transp.offset = 24;
 447                 var->transp.length = 0;
 448                 break;
 449         default:
 450                 break;
 451         }
 452
 453         var->blue.msb_right = var->green.msb_right =
 454             var->red.msb_right = var->transp.msb_right = 0;
 455 }
 456
 457 /*
 458  * Device initialization.
 459  * We initialize one vml_par struct per device and one vml_info
 460  * struct per pipe. Currently we have only one pipe.
 461  */
 462
 463 static int __devinit vml_pci_probe(struct pci_dev *dev,
 464                                    const struct pci_device_id *id)
 465 {
 466         struct vml_info *vinfo;
 467         struct fb_info *info;
 468         struct vml_par *par;
 469         int err = 0;
 470
 471         par = kzalloc(sizeof(*par), GFP_KERNEL);
 472         if (par == NULL)
 473                 return -ENOMEM;
 474
 475         vinfo = kzalloc(sizeof(*vinfo), GFP_KERNEL);
 476         if (vinfo == NULL) {
 477                 err = -ENOMEM;
 478                 goto out_err_0;
 479         }
 480
 481         vinfo->par = par;
 482         par->vdc = dev;
 483         atomic_set(&par->refcount, 1);
 484
 485         switch (id->device) {
 486         case VML_DEVICE_VDC:
 487                 if ((err = vmlfb_get_gpu(par)))
 488                         goto out_err_1;
 489                 pci_set_drvdata(dev, &vinfo->info);
 490                 break;
 491         default:
 492                 err = -ENODEV;
 493                 goto out_err_1;
 494                 break;
 495         }
 496
 497         info = &vinfo->info;
 498         info->flags = FBINFO_DEFAULT | FBINFO_PARTIAL_PAN_OK;
 499
 500         err = vmlfb_enable_mmio(par);
 501         if (err)
 502                 goto out_err_2;
 503
 504         err = vmlfb_alloc_vram(vinfo, vml_mem_requested,
 505                                vml_mem_contig, vml_mem_min);
 506         if (err)
 507                 goto out_err_3;
 508
 509         strcpy(info->fix.id, "Vermilion Range");
 510         info->fix.mmio_start = 0;
 511         info->fix.mmio_len = 0;
 512         info->fix.smem_start = vinfo->vram_start;
 513         info->fix.smem_len = vinfo->vram_contig_size;
 514         info->fix.type = FB_TYPE_PACKED_PIXELS;
 515         info->fix.visual = FB_VISUAL_TRUECOLOR;
 516         info->fix.ypanstep = 1;
 517         info->fix.xpanstep = 1;
 518         info->fix.ywrapstep = 0;
 519         info->fix.accel = FB_ACCEL_NONE;
 520         info->screen_base = vinfo->vram_logical;
 521         info->pseudo_palette = vinfo->pseudo_palette;
 522         info->par = par;
 523         info->fbops = &vmlfb_ops;
 524         info->device = &dev->dev;
 525
 526         INIT_LIST_HEAD(&vinfo->head);
 527         vinfo->pipe_disabled = 1;
 528         vinfo->cur_blank_mode = FB_BLANK_UNBLANK;
 529
 530         info->var.grayscale = 0;
 531         info->var.bits_per_pixel = 16;
 532         vmlfb_set_pref_pixel_format(&info->var);
 533
 534         if (!fb_find_mode
 535             (&info->var, info, vml_default_mode, NULL, 0, &defaultmode, 16)) {
 536                 printk(KERN_ERR MODULE_NAME ": Could not find initial mode\n");
 537         }
 538
 539         if (fb_alloc_cmap(&info->cmap, 256, 1) < 0) {
 540                 err = -ENOMEM;
 541                 goto out_err_4;
 542         }
 543
 544         err = register_framebuffer(info);
 545         if (err) {
 546                 printk(KERN_ERR MODULE_NAME ": Register framebuffer error.\n");
 547                 goto out_err_5;
 548         }
 549
 550         printk("Initialized vmlfb\n");
 551
 552         return 0;
 553
 554 out_err_5:
 555         fb_dealloc_cmap(&info->cmap);
 556 out_err_4:
 557         vmlfb_free_vram(vinfo);
 558 out_err_3:
 559         vmlfb_disable_mmio(par);
 560 out_err_2:
 561         vmlfb_release_devices(par);
 562 out_err_1:
 563         kfree(vinfo);
 564 out_err_0:
 565         kfree(par);
 566         return err;
 567 }
 568
 569 static int vmlfb_open(struct fb_info *info, int user)
 570 {
 571         /*
 572          * Save registers here?
 573          */
 574         return 0;
 575 }
 576
 577 static int vmlfb_release(struct fb_info *info, int user)
 578 {
 579         /*
 580          * Restore registers here.
 581          */
 582
 583         return 0;
 584 }
 585
 586 static int vml_nearest_clock(int clock)
 587 {
 588
 589         int i;
 590         int cur_index;
 591         int cur_diff;
 592         int diff;
 593
 594         cur_index = 0;
 595         cur_diff = clock - vml_clocks[0];
 596         cur_diff = (cur_diff < 0) ? -cur_diff : cur_diff;
 597         for (i = 1; i < vml_num_clocks; ++i) {
 598                 diff = clock - vml_clocks[i];
 599                 diff = (diff < 0) ? -diff : diff;
 600                 if (diff < cur_diff) {
 601                         cur_index = i;
 602                         cur_diff = diff;
 603                 }
 604         }
 605         return vml_clocks[cur_index];
 606 }
 607
 608 static int vmlfb_check_var_locked(struct fb_var_screeninfo *var,
 609                                   struct vml_info *vinfo)
 610 {
 611         u32 pitch;
 612         u64 mem;
 613         int nearest_clock;
 614         int clock;
 615         int clock_diff;
 616         struct fb_var_screeninfo v;
 617
 618         v = *var;
 619         clock = PICOS2KHZ(var->pixclock);
 620
 621         if (subsys && subsys->nearest_clock) {
 622                 nearest_clock = subsys->nearest_clock(subsys, clock);
 623         } else {
 624                 nearest_clock = vml_nearest_clock(clock);
 625         }
 626
 627         /*
 628          * Accept a 20% diff.
 629          */
 630
 631         clock_diff = nearest_clock - clock;
 632         clock_diff = (clock_diff < 0) ? -clock_diff : clock_diff;
 633         if (clock_diff > clock / 5) {
 634 #if 0
 635                 printk(KERN_DEBUG MODULE_NAME ": Diff failure. %d %d\n",clock_diff,clock);
 636 #endif
 637                 return -EINVAL;
 638         }
 639
 640         v.pixclock = KHZ2PICOS(nearest_clock);
 641
 642         if (var->xres > VML_MAX_XRES || var->yres > VML_MAX_YRES) {
 643                 printk(KERN_DEBUG MODULE_NAME ": Resolution failure.\n");
 644                 return -EINVAL;
 645         }
 646         if (var->xres_virtual > VML_MAX_XRES_VIRTUAL) {
 647                 printk(KERN_DEBUG MODULE_NAME
 648                        ": Virtual resolution failure.\n");
 649                 return -EINVAL;
 650         }
 651         switch (v.bits_per_pixel) {
 652         case 0 ... 16:
 653                 v.bits_per_pixel = 16;
 654                 break;
 655         case 17 ... 32:
 656                 v.bits_per_pixel = 32;
 657                 break;
 658         default:
 659                 printk(KERN_DEBUG MODULE_NAME ": Invalid bpp: %d.\n",
 660                        var->bits_per_pixel);
 661                 return -EINVAL;
 662         }
 663
 664         pitch = __ALIGN_MASK((var->xres * var->bits_per_pixel) >> 3, 0x3F);
 665         mem = pitch * var->yres_virtual;
 666         if (mem > vinfo->vram_contig_size) {
 667                 return -ENOMEM;
 668         }
 669
 670         switch (v.bits_per_pixel) {
 671         case 16:
 672                 if (var->blue.offset != 0 ||
 673                     var->blue.length != 5 ||
 674                     var->green.offset != 5 ||
 675                     var->green.length != 5 ||
 676                     var->red.offset != 10 ||
 677                     var->red.length != 5 ||
 678                     var->transp.offset != 15 || var->transp.length != 1) {
 679                         vmlfb_set_pref_pixel_format(&v);
 680                 }
 681                 break;
 682         case 32:
 683                 if (var->blue.offset != 0 ||
 684                     var->blue.length != 8 ||
 685                     var->green.offset != 8 ||
 686                     var->green.length != 8 ||
 687                     var->red.offset != 16 ||
 688                     var->red.length != 8 ||
 689                     (var->transp.length != 0 && var->transp.length != 8) ||
 690                     (var->transp.length == 8 && var->transp.offset != 24)) {
 691                         vmlfb_set_pref_pixel_format(&v);
 692                 }
 693                 break;
 694         default:
 695                 return -EINVAL;
 696         }
 697
 698         *var = v;
 699
 700         return 0;
 701 }
 702
 703 static int vmlfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 704 {
 705         struct vml_info *vinfo = container_of(info, struct vml_info, info);
 706         int ret;
 707
 708         mutex_lock(&vml_mutex);
 709         ret = vmlfb_check_var_locked(var, vinfo);
 710         mutex_unlock(&vml_mutex);
 711
 712         return ret;
 713 }
 714
 715 static void vml_wait_vblank(struct vml_info *vinfo)
 716 {
 717         /* Wait for vblank. For now, just wait for a 50Hz cycle (20ms)) */
 718         mdelay(20);
 719 }
 720
 721 static void vmlfb_disable_pipe(struct vml_info *vinfo)
 722 {
 723         struct vml_par *par = vinfo->par;
 724
 725         /* Disable the MDVO pad */
 726         VML_WRITE32(par, VML_RCOMPSTAT, 0);
 727         while (!(VML_READ32(par, VML_RCOMPSTAT) & VML_MDVO_VDC_I_RCOMP)) ;
 728
 729         /* Disable display planes */
 730         VML_WRITE32(par, VML_DSPCCNTR,
 731                     VML_READ32(par, VML_DSPCCNTR) & ~VML_GFX_ENABLE);
 732         (void)VML_READ32(par, VML_DSPCCNTR);
 733         /* Wait for vblank for the disable to take effect */
 734         vml_wait_vblank(vinfo);
 735
 736         /* Next, disable display pipes */
 737         VML_WRITE32(par, VML_PIPEACONF, 0);
 738         (void)VML_READ32(par, VML_PIPEACONF);
 739
 740         vinfo->pipe_disabled = 1;
 741 }
 742
 743 #ifdef VERMILION_DEBUG
 744 static void vml_dump_regs(struct vml_info *vinfo)
 745 {
 746         struct vml_par *par = vinfo->par;
 747
 748         printk(KERN_DEBUG MODULE_NAME ": Modesetting register dump:\n");
 749         printk(KERN_DEBUG MODULE_NAME ": \tHTOTAL_A         : 0x%08x\n",
 750                (unsigned)VML_READ32(par, VML_HTOTAL_A));
 751         printk(KERN_DEBUG MODULE_NAME ": \tHBLANK_A         : 0x%08x\n",
 752                (unsigned)VML_READ32(par, VML_HBLANK_A));
 753         printk(KERN_DEBUG MODULE_NAME ": \tHSYNC_A          : 0x%08x\n",
 754                (unsigned)VML_READ32(par, VML_HSYNC_A));
 755         printk(KERN_DEBUG MODULE_NAME ": \tVTOTAL_A         : 0x%08x\n",
 756                (unsigned)VML_READ32(par, VML_VTOTAL_A));
 757         printk(KERN_DEBUG MODULE_NAME ": \tVBLANK_A         : 0x%08x\n",
 758                (unsigned)VML_READ32(par, VML_VBLANK_A));
 759         printk(KERN_DEBUG MODULE_NAME ": \tVSYNC_A          : 0x%08x\n",
 760                (unsigned)VML_READ32(par, VML_VSYNC_A));
 761         printk(KERN_DEBUG MODULE_NAME ": \tDSPCSTRIDE       : 0x%08x\n",
 762                (unsigned)VML_READ32(par, VML_DSPCSTRIDE));
 763         printk(KERN_DEBUG MODULE_NAME ": \tDSPCSIZE         : 0x%08x\n",
 764                (unsigned)VML_READ32(par, VML_DSPCSIZE));
 765         printk(KERN_DEBUG MODULE_NAME ": \tDSPCPOS          : 0x%08x\n",
 766                (unsigned)VML_READ32(par, VML_DSPCPOS));
 767         printk(KERN_DEBUG MODULE_NAME ": \tDSPARB           : 0x%08x\n",
 768                (unsigned)VML_READ32(par, VML_DSPARB));
 769         printk(KERN_DEBUG MODULE_NAME ": \tDSPCADDR         : 0x%08x\n",
 770                (unsigned)VML_READ32(par, VML_DSPCADDR));
 771         printk(KERN_DEBUG MODULE_NAME ": \tBCLRPAT_A        : 0x%08x\n",
 772                (unsigned)VML_READ32(par, VML_BCLRPAT_A));
 773         printk(KERN_DEBUG MODULE_NAME ": \tCANVSCLR_A       : 0x%08x\n",
 774                (unsigned)VML_READ32(par, VML_CANVSCLR_A));
 775         printk(KERN_DEBUG MODULE_NAME ": \tPIPEASRC         : 0x%08x\n",
 776                (unsigned)VML_READ32(par, VML_PIPEASRC));
 777         printk(KERN_DEBUG MODULE_NAME ": \tPIPEACONF        : 0x%08x\n",
 778                (unsigned)VML_READ32(par, VML_PIPEACONF));
 779         printk(KERN_DEBUG MODULE_NAME ": \tDSPCCNTR         : 0x%08x\n",
 780                (unsigned)VML_READ32(par, VML_DSPCCNTR));
 781         printk(KERN_DEBUG MODULE_NAME ": \tRCOMPSTAT        : 0x%08x\n",
 782                (unsigned)VML_READ32(par, VML_RCOMPSTAT));
 783         printk(KERN_DEBUG MODULE_NAME ": End of modesetting register dump.\n");
 784 }
 785 #endif
 786
 787 static int vmlfb_set_par_locked(struct vml_info *vinfo)
 788 {
 789         struct vml_par *par = vinfo->par;
 790         struct fb_info *info = &vinfo->info;
 791         struct fb_var_screeninfo *var = &info->var;
 792         u32 htotal, hactive, hblank_start, hblank_end, hsync_start, hsync_end;
 793         u32 vtotal, vactive, vblank_start, vblank_end, vsync_start, vsync_end;
 794         u32 dspcntr;
 795         int clock;
 796
 797         vinfo->bytes_per_pixel = var->bits_per_pixel >> 3;
 798         vinfo->stride =
 799             __ALIGN_MASK(var->xres_virtual * vinfo->bytes_per_pixel, 0x3F);
 800         info->fix.line_length = vinfo->stride;
 801
 802         if (!subsys)
 803                 return 0;
 804
 805         htotal =
 806             var->xres + var->right_margin + var->hsync_len + var->left_margin;
 807         hactive = var->xres;
 808         hblank_start = var->xres;
 809         hblank_end = htotal;
 810         hsync_start = hactive + var->right_margin;
 811         hsync_end = hsync_start + var->hsync_len;
 812
 813         vtotal =
 814             var->yres + var->lower_margin + var->vsync_len + var->upper_margin;
 815         vactive = var->yres;
 816         vblank_start = var->yres;
 817         vblank_end = vtotal;
 818         vsync_start = vactive + var->lower_margin;
 819         vsync_end = vsync_start + var->vsync_len;
 820
 821         dspcntr = VML_GFX_ENABLE | VML_GFX_GAMMABYPASS;
 822         clock = PICOS2KHZ(var->pixclock);
 823
 824         if (subsys->nearest_clock) {
 825                 clock = subsys->nearest_clock(subsys, clock);
 826         } else {
 827                 clock = vml_nearest_clock(clock);
 828         }
 829         printk(KERN_DEBUG MODULE_NAME
 830                ": Set mode Hfreq : %d kHz, Vfreq : %d Hz.\n", clock / htotal,
 831                ((clock / htotal) * 1000) / vtotal);
 832
 833         switch (var->bits_per_pixel) {
 834         case 16:
 835                 dspcntr |= VML_GFX_ARGB1555;
 836                 break;
 837         case 32:
 838                 if (var->transp.length == 8)
 839                         dspcntr |= VML_GFX_ARGB8888 | VML_GFX_ALPHAMULT;
 840                 else
 841                         dspcntr |= VML_GFX_RGB0888;
 842                 break;
 843         default:
 844                 return -EINVAL;
 845         }
 846
 847         vmlfb_disable_pipe(vinfo);
 848         mb();
 849
 850         if (subsys->set_clock)
 851                 subsys->set_clock(subsys, clock);
 852         else
 853                 return -EINVAL;
 854
 855         VML_WRITE32(par, VML_HTOTAL_A, ((htotal - 1) << 16) | (hactive - 1));
 856         VML_WRITE32(par, VML_HBLANK_A,
 857                     ((hblank_end - 1) << 16) | (hblank_start - 1));
 858         VML_WRITE32(par, VML_HSYNC_A,
 859                     ((hsync_end - 1) << 16) | (hsync_start - 1));
 860         VML_WRITE32(par, VML_VTOTAL_A, ((vtotal - 1) << 16) | (vactive - 1));
 861         VML_WRITE32(par, VML_VBLANK_A,
 862                     ((vblank_end - 1) << 16) | (vblank_start - 1));
 863         VML_WRITE32(par, VML_VSYNC_A,
 864                     ((vsync_end - 1) << 16) | (vsync_start - 1));
 865         VML_WRITE32(par, VML_DSPCSTRIDE, vinfo->stride);
 866         VML_WRITE32(par, VML_DSPCSIZE,
 867                     ((var->yres - 1) << 16) | (var->xres - 1));
 868         VML_WRITE32(par, VML_DSPCPOS, 0x00000000);
 869         VML_WRITE32(par, VML_DSPARB, VML_FIFO_DEFAULT);
 870         VML_WRITE32(par, VML_BCLRPAT_A, 0x00000000);
 871         VML_WRITE32(par, VML_CANVSCLR_A, 0x00000000);
 872         VML_WRITE32(par, VML_PIPEASRC,
 873                     ((var->xres - 1) << 16) | (var->yres - 1));
 874
 875         wmb();
 876         VML_WRITE32(par, VML_PIPEACONF, VML_PIPE_ENABLE);
 877         wmb();
 878         VML_WRITE32(par, VML_DSPCCNTR, dspcntr);
 879         wmb();
 880         VML_WRITE32(par, VML_DSPCADDR, (u32) vinfo->vram_start +
 881                     var->yoffset * vinfo->stride +
 882                     var->xoffset * vinfo->bytes_per_pixel);
 883
 884         VML_WRITE32(par, VML_RCOMPSTAT, VML_MDVO_PAD_ENABLE);
 885
 886         while (!(VML_READ32(par, VML_RCOMPSTAT) &
 887                  (VML_MDVO_VDC_I_RCOMP | VML_MDVO_PAD_ENABLE))) ;
 888
 889         vinfo->pipe_disabled = 0;
 890 #ifdef VERMILION_DEBUG
 891         vml_dump_regs(vinfo);
 892 #endif
 893
 894         return 0;
 895 }
 896
 897 static int vmlfb_set_par(struct fb_info *info)
 898 {
 899         struct vml_info *vinfo = container_of(info, struct vml_info, info);
 900         int ret;
 901
 902         mutex_lock(&vml_mutex);
 903         list_del(&vinfo->head);
 904         list_add(&vinfo->head, (subsys) ? &global_has_mode : &global_no_mode);
 905         ret = vmlfb_set_par_locked(vinfo);
 906
 907         mutex_unlock(&vml_mutex);
 908         return ret;
 909 }
 910
 911 static int vmlfb_blank_locked(struct vml_info *vinfo)
 912 {
 913         struct vml_par *par = vinfo->par;
 914         u32 cur = VML_READ32(par, VML_PIPEACONF);
 915
 916         switch (vinfo->cur_blank_mode) {
 917         case FB_BLANK_UNBLANK:
 918                 if (vinfo->pipe_disabled) {
 919                         vmlfb_set_par_locked(vinfo);
 920                 }
 921                 VML_WRITE32(par, VML_PIPEACONF, cur & ~VML_PIPE_FORCE_BORDER);
 922                 (void)VML_READ32(par, VML_PIPEACONF);
 923                 break;
 924         case FB_BLANK_NORMAL:
 925                 if (vinfo->pipe_disabled) {
 926                         vmlfb_set_par_locked(vinfo);
 927                 }
 928                 VML_WRITE32(par, VML_PIPEACONF, cur | VML_PIPE_FORCE_BORDER);
 929                 (void)VML_READ32(par, VML_PIPEACONF);
 930                 break;
 931         case FB_BLANK_VSYNC_SUSPEND:
 932         case FB_BLANK_HSYNC_SUSPEND:
 933                 if (!vinfo->pipe_disabled) {
 934                         vmlfb_disable_pipe(vinfo);
 935                 }
 936                 break;
 937         case FB_BLANK_POWERDOWN:
 938                 if (!vinfo->pipe_disabled) {
 939                         vmlfb_disable_pipe(vinfo);
 940                 }
 941                 break;
 942         default:
 943                 return -EINVAL;
 944         }
 945
 946         return 0;
 947 }
 948
 949 static int vmlfb_blank(int blank_mode, struct fb_info *info)
 950 {
 951         struct vml_info *vinfo = container_of(info, struct vml_info, info);
 952         int ret;
 953
 954         mutex_lock(&vml_mutex);
 955         vinfo->cur_blank_mode = blank_mode;
 956         ret = vmlfb_blank_locked(vinfo);
 957         mutex_unlock(&vml_mutex);
 958         return ret;
 959 }
 960
 961 static int vmlfb_pan_display(struct fb_var_screeninfo *var,
 962                              struct fb_info *info)
 963 {
 964         struct vml_info *vinfo = container_of(info, struct vml_info, info);
 965         struct vml_par *par = vinfo->par;
 966
 967         mutex_lock(&vml_mutex);
 968         VML_WRITE32(par, VML_DSPCADDR, (u32) vinfo->vram_start +
 969                     var->yoffset * vinfo->stride +
 970                     var->xoffset * vinfo->bytes_per_pixel);
 971         (void)VML_READ32(par, VML_DSPCADDR);
 972         mutex_unlock(&vml_mutex);
 973
 974         return 0;
 975 }
 976
 977 static int vmlfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 978                            u_int transp, struct fb_info *info)
 979 {
 980         u32 v;
 981
 982         if (regno >= 16)
 983                 return -EINVAL;
 984
 985         if (info->var.grayscale) {
 986                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 987         }
 988
 989         if (info->fix.visual != FB_VISUAL_TRUECOLOR)
 990                 return -EINVAL;
 991
 992         red = VML_TOHW(red, info->var.red.length);
 993         blue = VML_TOHW(blue, info->var.blue.length);
 994         green = VML_TOHW(green, info->var.green.length);
 995         transp = VML_TOHW(transp, info->var.transp.length);
 996
 997         v = (red << info->var.red.offset) |
 998             (green << info->var.green.offset) |
 999             (blue << info->var.blue.offset) |
1000             (transp << info->var.transp.offset);
1001
1002         switch (info->var.bits_per_pixel) {
1003         case 16:
1004                 ((u32 *) info->pseudo_palette)[regno] = v;
1005                 break;
1006         case 24:
1007         case 32:
1008                 ((u32 *) info->pseudo_palette)[regno] = v;
1009                 break;
1010         }
1011         return 0;
1012 }
1013
1014 static int vmlfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
1015 {
1016         struct vml_info *vinfo = container_of(info, struct vml_info, info);
1017         unsigned long size = vma->vm_end - vma->vm_start;
1018         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
1019         int ret;
1020
1021         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1022                 return -EINVAL;
1023         if (offset + size > vinfo->vram_contig_size)
1024                 return -EINVAL;
1025         ret = vmlfb_vram_offset(vinfo, offset);
1026         if (ret)
1027                 return -EINVAL;
1028         offset += vinfo->vram_start;
1029         pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
1030         pgprot_val(vma->vm_page_prot) &= ~_PAGE_PWT;
1031         vma->vm_flags |= VM_RESERVED | VM_IO;
1032         if (remap_pfn_range(vma, vma->vm_start, offset >> PAGE_SHIFT,
1033                                                 size, vma->vm_page_prot))
1034                 return -EAGAIN;
1035         return 0;
1036 }
1037
1038 static int vmlfb_sync(struct fb_info *info)
1039 {
1040         return 0;
1041 }
1042
1043 static int vmlfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1044 {
1045         return -EINVAL; /* just to force soft_cursor() call */
1046 }
1047
1048 static struct fb_ops vmlfb_ops = {
1049         .owner = THIS_MODULE,
1050         .fb_open = vmlfb_open,
1051         .fb_release = vmlfb_release,
1052         .fb_check_var = vmlfb_check_var,
1053         .fb_set_par = vmlfb_set_par,
1054         .fb_blank = vmlfb_blank,
1055         .fb_pan_display = vmlfb_pan_display,
1056         .fb_fillrect = cfb_fillrect,
1057         .fb_copyarea = cfb_copyarea,
1058         .fb_imageblit = cfb_imageblit,
1059         .fb_cursor = vmlfb_cursor,
1060         .fb_sync = vmlfb_sync,
1061         .fb_mmap = vmlfb_mmap,
1062         .fb_setcolreg = vmlfb_setcolreg
1063 };
1064
1065 static struct pci_device_id vml_ids[] = {
1066         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, VML_DEVICE_VDC)},
1067         {0}
1068 };
1069
1070 static struct pci_driver vmlfb_pci_driver = {
1071         .name = "vmlfb",
1072         .id_table = vml_ids,
1073         .probe = vml_pci_probe,
1074         .remove = __devexit_p(vml_pci_remove)
1075 };
1076
1077 static void __exit vmlfb_cleanup(void)
1078 {
1079         pci_unregister_driver(&vmlfb_pci_driver);
1080 }
1081
1082 static int __init vmlfb_init(void)
1083 {
1084
1085 #ifndef MODULE
1086         char *option = NULL;
1087
1088         if (fb_get_options(MODULE_NAME, &option))
1089                 return -ENODEV;
1090 #endif
1091
1092         printk(KERN_DEBUG MODULE_NAME ": initializing\n");
1093         mutex_init(&vml_mutex);
1094         INIT_LIST_HEAD(&global_no_mode);
1095         INIT_LIST_HEAD(&global_has_mode);
1096
1097         return pci_register_driver(&vmlfb_pci_driver);
1098 }
1099
1100 int vmlfb_register_subsys(struct vml_sys *sys)
1101 {
1102         struct vml_info *entry;
1103         struct list_head *list;
1104         u32 save_activate;
1105
1106         mutex_lock(&vml_mutex);
1107         if (subsys != NULL) {
1108                 subsys->restore(subsys);
1109         }
1110         subsys = sys;
1111         subsys->save(subsys);
1112
1113         /*
1114          * We need to restart list traversal for each item, since we
1115          * release the list mutex in the loop.
1116          */
1117
1118         list = global_no_mode.next;
1119         while (list != &global_no_mode) {
1120                 list_del_init(list);
1121                 entry = list_entry(list, struct vml_info, head);
1122
1123                 /*
1124                  * First, try the current mode which might not be
1125                  * completely validated with respect to the pixel clock.
1126                  */
1127
1128                 if (!vmlfb_check_var_locked(&entry->info.var, entry)) {
1129                         vmlfb_set_par_locked(entry);
1130                         list_add_tail(list, &global_has_mode);
1131                 } else {
1132
1133                         /*
1134                          * Didn't work. Try to find another mode,
1135                          * that matches this subsys.
1136                          */
1137
1138                         mutex_unlock(&vml_mutex);
1139                         save_activate = entry->info.var.activate;
1140                         entry->info.var.bits_per_pixel = 16;
1141                         vmlfb_set_pref_pixel_format(&entry->info.var);
1142                         if (fb_find_mode(&entry->info.var,
1143                                          &entry->info,
1144                                          vml_default_mode, NULL, 0, NULL, 16)) {
1145                                 entry->info.var.activate |=
1146                                     FB_ACTIVATE_FORCE | FB_ACTIVATE_NOW;
1147                                 fb_set_var(&entry->info, &entry->info.var);
1148                         } else {
1149                                 printk(KERN_ERR MODULE_NAME
1150                                        ": Sorry. no mode found for this subsys.\n");
1151                         }
1152                         entry->info.var.activate = save_activate;
1153                         mutex_lock(&vml_mutex);
1154                 }
1155                 vmlfb_blank_locked(entry);
1156                 list = global_no_mode.next;
1157         }
1158         mutex_unlock(&vml_mutex);
1159
1160         printk(KERN_DEBUG MODULE_NAME ": Registered %s subsystem.\n",
1161                                 subsys->name ? subsys->name : "unknown");
1162         return 0;
1163 }
1164
1165 EXPORT_SYMBOL_GPL(vmlfb_register_subsys);
1166
1167 void vmlfb_unregister_subsys(struct vml_sys *sys)
1168 {
1169         struct vml_info *entry, *next;
1170
1171         mutex_lock(&vml_mutex);
1172         if (subsys != sys) {
1173                 mutex_unlock(&vml_mutex);
1174                 return;
1175         }
1176         subsys->restore(subsys);
1177         subsys = NULL;
1178         list_for_each_entry_safe(entry, next, &global_has_mode, head) {
1179                 printk(KERN_DEBUG MODULE_NAME ": subsys disable pipe\n");
1180                 vmlfb_disable_pipe(entry);
1181                 list_del(&entry->head);
1182                 list_add_tail(&entry->head, &global_no_mode);
1183         }
1184         mutex_unlock(&vml_mutex);
1185 }
1186
1187 EXPORT_SYMBOL_GPL(vmlfb_unregister_subsys);
1188
1189 module_init(vmlfb_init);
1190 module_exit(vmlfb_cleanup);
1191
1192 MODULE_AUTHOR("Tungsten Graphics");
1193 MODULE_DESCRIPTION("Initialization of the Vermilion display devices");
1194 MODULE_VERSION("1.0.0");
1195 MODULE_LICENSE("GPL");