drivers/staging/udlfb/udlfb.c

   1 /*****************************************************************************
   2  *                          DLFB Kernel Driver                               *
   3  *                            Version 0.2 (udlfb)                            *
   4  *             (C) 2009 Roberto De Ioris <roberto@unbit.it>                  *
   5  *                                                                           *
   6  *     This file is licensed under the GPLv2. See COPYING in the package.    *
   7  * Based on the amazing work of Florian Echtler and libdlo 0.1               *
   8  *                                                                           *
   9  *                                                                           *
  10  * 31.05.09 release 0.2                                                      *
  11  * 22.05.09 First public (ugly) release                                      *
  12  *****************************************************************************/
  13
  14 #include <linux/module.h>
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/usb.h>
  18 #include <linux/uaccess.h>
  19 #include <linux/mm.h>
  20 #include <linux/fb.h>
  21 #include <linux/mutex.h>
  22
  23 #include "udlfb.h"
  24
  25 #define DRIVER_VERSION "DLFB 0.2"
  26
  27 /* memory functions taken from vfb */
  28
  29 static void *rvmalloc(unsigned long size)
  30 {
  31         void *mem;
  32         unsigned long adr;
  33
  34         size = PAGE_ALIGN(size);
  35         mem = vmalloc_32(size);
  36         if (!mem)
  37                 return NULL;
  38
  39         memset(mem, 0, size);   /* Clear the ram out, no junk to the user */
  40         adr = (unsigned long)mem;
  41         while (size > 0) {
  42                 SetPageReserved(vmalloc_to_page((void *)adr));
  43                 adr += PAGE_SIZE;
  44                 size -= PAGE_SIZE;
  45         }
  46
  47         return mem;
  48 }
  49
  50 static void rvfree(void *mem, unsigned long size)
  51 {
  52         unsigned long adr;
  53
  54         if (!mem)
  55                 return;
  56
  57         adr = (unsigned long)mem;
  58         while ((long)size > 0) {
  59                 ClearPageReserved(vmalloc_to_page((void *)adr));
  60                 adr += PAGE_SIZE;
  61                 size -= PAGE_SIZE;
  62         }
  63         vfree(mem);
  64 }
  65
  66 static int dlfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
  67 {
  68         unsigned long start = vma->vm_start;
  69         unsigned long size = vma->vm_end - vma->vm_start;
  70         unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
  71         unsigned long page, pos;
  72
  73         printk("MMAP: %lu %u\n", offset + size, info->fix.smem_len);
  74
  75         if (offset + size > info->fix.smem_len)
  76                 return -EINVAL;
  77
  78         pos = (unsigned long)info->fix.smem_start + offset;
  79
  80         while (size > 0) {
  81                 page = vmalloc_to_pfn((void *)pos);
  82                 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
  83                         return -EAGAIN;
  84
  85                 start += PAGE_SIZE;
  86                 pos += PAGE_SIZE;
  87                 if (size > PAGE_SIZE)
  88                         size -= PAGE_SIZE;
  89                 else
  90                         size = 0;
  91         }
  92
  93         vma->vm_flags |= VM_RESERVED;   /* avoid to swap out this VMA */
  94         return 0;
  95
  96 }
  97
  98 /* ioctl structure */
  99 struct dloarea {
 100         int x, y;
 101         int w, h;
 102 };
 103
 104 /*
 105 static struct usb_device_id id_table [] = {
 106         { USB_DEVICE(0x17e9, 0x023d) },
 107         { }
 108 };
 109 */
 110
 111 static struct usb_device_id id_table[] = {
 112         {.idVendor = 0x17e9, .match_flags = USB_DEVICE_ID_MATCH_VENDOR,},
 113         {},
 114 };
 115 MODULE_DEVICE_TABLE(usb, id_table);
 116
 117 static struct usb_driver dlfb_driver;
 118
 119 static int
 120 image_blit(struct dlfb_data *dev_info, int x, int y, int width, int height,
 121            char *data)
 122 {
 123
 124         int i, j, base;
 125         int rem = width;
 126         int ret;
 127
 128         int diff;
 129
 130         char *bufptr;
 131
 132         if (x + width > dev_info->info->var.xres)
 133                 return -EINVAL;
 134
 135         if (y + height > dev_info->info->var.yres)
 136                 return -EINVAL;
 137
 138         mutex_lock(&dev_info->bulk_mutex);
 139
 140         base = dev_info->base16 + (dev_info->info->var.xres * 2 * y) + (x * 2);
 141
 142         data += (dev_info->info->var.xres * 2 * y) + (x * 2);
 143
 144         /* printk("IMAGE_BLIT\n"); */
 145
 146         bufptr = dev_info->buf;
 147
 148         for (i = y; i < y + height; i++) {
 149
 150                 if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) {
 151                         ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
 152                         bufptr = dev_info->buf;
 153                 }
 154
 155                 rem = width;
 156
 157                 /* printk("WRITING LINE %d\n", i); */
 158
 159                 while (rem) {
 160
 161                         if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) {
 162                                 ret =
 163                                     dlfb_bulk_msg(dev_info,
 164                                                   bufptr - dev_info->buf);
 165                                 bufptr = dev_info->buf;
 166                         }
 167
 168                         if (rem > 255) {
 169
 170                                 diff = 0;
 171                                 for (j = 0; j < 510; j++) {
 172                                         if (dev_info->
 173                                             backing_buffer[base + j] !=
 174                                             data[j]) {
 175                                                 diff = 1;
 176                                                 break;
 177                                         }
 178                                 }
 179
 180                                 if (diff == 1) {
 181                                         *bufptr++ = 0xAF;
 182                                         *bufptr++ = 0x68;
 183
 184                                         *bufptr++ = (char)(base >> 16);
 185                                         *bufptr++ = (char)(base >> 8);
 186                                         *bufptr++ = (char)(base);
 187                                         *bufptr++ = 255;
 188                                         /* PUT COMPRESSION HERE */
 189                                         for (j = 0; j < 510; j += 2) {
 190                                                 bufptr[j] = data[j + 1];
 191                                                 bufptr[j + 1] = data[j];
 192                                         }
 193                                         bufptr += 510;
 194                                 }
 195
 196                                 rem -= 255;
 197                                 base += 510;
 198                                 data += 510;
 199                         } else {
 200
 201                                 diff = 0;
 202
 203                                 for (j = 0; j < rem * 2; j++) {
 204                                         if (dev_info->
 205                                             backing_buffer[base + j] !=
 206                                             data[j]) {
 207                                                 diff = 1;
 208                                                 break;
 209                                         }
 210                                 }
 211
 212                                 if (diff == 1) {
 213
 214                                         *bufptr++ = 0xAF;
 215                                         *bufptr++ = 0x68;
 216
 217                                         *bufptr++ = (char)(base >> 16);
 218                                         *bufptr++ = (char)(base >> 8);
 219                                         *bufptr++ = (char)(base);
 220                                         *bufptr++ = rem;
 221                                         /* PUT COMPRESSION HERE */
 222                                         for (j = 0; j < rem * 2; j += 2) {
 223                                                 bufptr[j] = data[j + 1];
 224                                                 bufptr[j + 1] = data[j];
 225                                         }
 226                                         bufptr += rem * 2;
 227
 228                                 }
 229
 230                                 base += rem * 2;
 231                                 data += rem * 2;
 232                                 rem = 0;
 233                         }
 234
 235                 }
 236
 237                 memcpy(dev_info->backing_buffer + base - (width * 2),
 238                        data - (width * 2), width * 2);
 239
 240                 base += (dev_info->info->var.xres * 2) - (width * 2);
 241                 data += (dev_info->info->var.xres * 2) - (width * 2);
 242
 243         }
 244
 245         if (bufptr > dev_info->buf)
 246                 ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
 247
 248         mutex_unlock(&dev_info->bulk_mutex);
 249
 250         return base;
 251
 252 }
 253
 254 static int
 255 draw_rect(struct dlfb_data *dev_info, int x, int y, int width, int height,
 256           unsigned char red, unsigned char green, unsigned char blue)
 257 {
 258
 259         int i, j, base;
 260         int ret;
 261         unsigned short col =
 262             (((((red) & 0xF8) | ((green) >> 5)) & 0xFF) << 8) +
 263             (((((green) & 0x1C) << 3) | ((blue) >> 3)) & 0xFF);
 264         int rem = width;
 265
 266         char *bufptr;
 267
 268         if (x + width > dev_info->info->var.xres)
 269                 return -EINVAL;
 270
 271         if (y + height > dev_info->info->var.yres)
 272                 return -EINVAL;
 273
 274         mutex_lock(&dev_info->bulk_mutex);
 275
 276         base = dev_info->base16 + (dev_info->info->var.xres * 2 * y) + (x * 2);
 277
 278         bufptr = dev_info->buf;
 279
 280         for (i = y; i < y + height; i++) {
 281
 282                 for (j = 0; j < width * 2; j += 2) {
 283                         dev_info->backing_buffer[base + j] = (char)(col >> 8);
 284                         dev_info->backing_buffer[base + j + 1] = (char)(col);
 285                 }
 286                 if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) {
 287                         ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
 288                         bufptr = dev_info->buf;
 289                 }
 290
 291                 rem = width;
 292
 293                 while (rem) {
 294
 295                         if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) {
 296                                 ret =
 297                                     dlfb_bulk_msg(dev_info,
 298                                                   bufptr - dev_info->buf);
 299                                 bufptr = dev_info->buf;
 300                         }
 301
 302                         *bufptr++ = 0xAF;
 303                         *bufptr++ = 0x69;
 304
 305                         *bufptr++ = (char)(base >> 16);
 306                         *bufptr++ = (char)(base >> 8);
 307                         *bufptr++ = (char)(base);
 308
 309                         if (rem > 255) {
 310                                 *bufptr++ = 255;
 311                                 *bufptr++ = 255;
 312                                 rem -= 255;
 313                                 base += 255 * 2;
 314                         } else {
 315                                 *bufptr++ = rem;
 316                                 *bufptr++ = rem;
 317                                 base += rem * 2;
 318                                 rem = 0;
 319                         }
 320
 321                         *bufptr++ = (char)(col >> 8);
 322                         *bufptr++ = (char)(col);
 323
 324                 }
 325
 326                 base += (dev_info->info->var.xres * 2) - (width * 2);
 327
 328         }
 329
 330         if (bufptr > dev_info->buf)
 331                 ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
 332
 333         mutex_unlock(&dev_info->bulk_mutex);
 334
 335         return 1;
 336 }
 337
 338 static int
 339 copyarea(struct dlfb_data *dev_info, int dx, int dy, int sx, int sy,
 340          int width, int height)
 341 {
 342         int base;
 343         int source;
 344         int rem;
 345         int i, ret;
 346
 347         char *bufptr;
 348
 349         if (dx + width > dev_info->info->var.xres)
 350                 return -EINVAL;
 351
 352         if (dy + height > dev_info->info->var.yres)
 353                 return -EINVAL;
 354
 355         mutex_lock(&dev_info->bulk_mutex);
 356
 357         base =
 358             dev_info->base16 + (dev_info->info->var.xres * 2 * dy) + (dx * 2);
 359         source = (dev_info->info->var.xres * 2 * sy) + (sx * 2);
 360
 361         bufptr = dev_info->buf;
 362
 363         for (i = sy; i < sy + height; i++) {
 364
 365                 memcpy(dev_info->backing_buffer + base,
 366                        dev_info->backing_buffer + source, width * 2);
 367
 368                 if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) {
 369                         ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
 370                         bufptr = dev_info->buf;
 371                 }
 372
 373                 rem = width;
 374
 375                 while (rem) {
 376
 377                         if (dev_info->bufend - bufptr < BUF_HIGH_WATER_MARK) {
 378                                 ret =
 379                                     dlfb_bulk_msg(dev_info,
 380                                                   bufptr - dev_info->buf);
 381                                 bufptr = dev_info->buf;
 382                         }
 383
 384                         *bufptr++ = 0xAF;
 385                         *bufptr++ = 0x6A;
 386
 387                         *bufptr++ = (char)(base >> 16);
 388                         *bufptr++ = (char)(base >> 8);
 389                         *bufptr++ = (char)(base);
 390
 391                         if (rem > 255) {
 392                                 *bufptr++ = 255;
 393                                 *bufptr++ = (char)(source >> 16);
 394                                 *bufptr++ = (char)(source >> 8);
 395                                 *bufptr++ = (char)(source);
 396
 397                                 rem -= 255;
 398                                 base += 255 * 2;
 399                                 source += 255 * 2;
 400
 401                         } else {
 402                                 *bufptr++ = rem;
 403                                 *bufptr++ = (char)(source >> 16);
 404                                 *bufptr++ = (char)(source >> 8);
 405                                 *bufptr++ = (char)(source);
 406
 407                                 base += rem * 2;
 408                                 source += rem * 2;
 409                                 rem = 0;
 410                         }
 411                 }
 412
 413                 base += (dev_info->info->var.xres * 2) - (width * 2);
 414                 source += (dev_info->info->var.xres * 2) - (width * 2);
 415         }
 416
 417         if (bufptr > dev_info->buf)
 418                 ret = dlfb_bulk_msg(dev_info, bufptr - dev_info->buf);
 419
 420         mutex_unlock(&dev_info->bulk_mutex);
 421
 422         return 1;
 423 }
 424
 425 void dlfb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
 426 {
 427
 428         struct dlfb_data *dev = info->par;
 429
 430         copyarea(dev, area->dx, area->dy, area->sx, area->sy, area->width,
 431                  area->height);
 432
 433         /* printk("COPY AREA %d %d %d %d %d %d !!!\n", area->dx, area->dy, area->sx, area->sy, area->width, area->height); */
 434
 435 }
 436
 437 void dlfb_imageblit(struct fb_info *info, const struct fb_image *image)
 438 {
 439
 440         int ret;
 441         struct dlfb_data *dev = info->par;
 442         /* printk("IMAGE BLIT (1) %d %d %d %d DEPTH %d {%p}!!!\n", image->dx, image->dy, image->width, image->height, image->depth, dev->udev); */
 443         cfb_imageblit(info, image);
 444         ret =
 445             image_blit(dev, image->dx, image->dy, image->width, image->height,
 446                        info->screen_base);
 447         /* printk("IMAGE BLIT (2) %d %d %d %d DEPTH %d {%p} %d!!!\n", image->dx, image->dy, image->width, image->height, image->depth, dev->udev, ret); */
 448 }
 449
 450 void dlfb_fillrect(struct fb_info *info, const struct fb_fillrect *region)
 451 {
 452
 453         unsigned char red, green, blue;
 454         struct dlfb_data *dev = info->par;
 455
 456         memcpy(&red, &region->color, 1);
 457         memcpy(&green, &region->color + 1, 1);
 458         memcpy(&blue, &region->color + 2, 1);
 459         draw_rect(dev, region->dx, region->dy, region->width, region->height,
 460                   red, green, blue);
 461         /* printk("FILL RECT %d %d !!!\n", region->dx, region->dy); */
 462
 463 }
 464
 465 static int dlfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
 466 {
 467
 468         struct dlfb_data *dev_info = info->par;
 469         struct dloarea *area;
 470
 471         if (cmd == 0xAA) {
 472
 473                 area = (struct dloarea *)arg;
 474
 475                 if (area->x < 0)
 476                         area->x = 0;
 477
 478                 if (area->x > info->var.xres)
 479                         area->x = info->var.xres;
 480
 481                 if (area->y < 0)
 482                         area->y = 0;
 483
 484                 if (area->y > info->var.yres)
 485                         area->y = info->var.yres;
 486
 487                 image_blit(dev_info, area->x, area->y, area->w, area->h,
 488                            info->screen_base);
 489         }
 490         return 0;
 491 }
 492
 493 /* taken from vesafb */
 494
 495 static int
 496 dlfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 497                unsigned blue, unsigned transp, struct fb_info *info)
 498 {
 499         int err = 0;
 500
 501         if (regno >= info->cmap.len)
 502                 return 1;
 503
 504         if (regno < 16) {
 505                 if (info->var.red.offset == 10) {
 506                         /* 1:5:5:5 */
 507                         ((u32 *) (info->pseudo_palette))[regno] =
 508                             ((red & 0xf800) >> 1) |
 509                             ((green & 0xf800) >> 6) | ((blue & 0xf800) >> 11);
 510                 } else {
 511                         /* 0:5:6:5 */
 512                         ((u32 *) (info->pseudo_palette))[regno] =
 513                             ((red & 0xf800)) |
 514                             ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
 515                 }
 516         }
 517
 518         return err;
 519 }
 520
 521 static int dlfb_release(struct fb_info *info, int user)
 522 {
 523         struct dlfb_data *dev_info = info->par;
 524         image_blit(dev_info, 0, 0, info->var.xres, info->var.yres,
 525                    info->screen_base);
 526         return 0;
 527 }
 528
 529 static int dlfb_blank(int blank_mode, struct fb_info *info)
 530 {
 531         return 0;
 532 }
 533
 534 static struct fb_ops dlfb_ops = {
 535         .fb_setcolreg = dlfb_setcolreg,
 536         .fb_fillrect = dlfb_fillrect,
 537         .fb_copyarea = dlfb_copyarea,
 538         .fb_imageblit = dlfb_imageblit,
 539         .fb_mmap = dlfb_mmap,
 540         .fb_ioctl = dlfb_ioctl,
 541         .fb_release = dlfb_release,
 542         .fb_blank = dlfb_blank,
 543 };
 544
 545 static int
 546 dlfb_probe(struct usb_interface *interface, const struct usb_device_id *id)
 547 {
 548         struct dlfb_data *dev_info;
 549         struct fb_info *info;
 550         int i;
 551
 552         int ret;
 553         char rbuf[4];
 554
 555         dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL);
 556         if (dev_info == NULL) {
 557                 printk("cannot allocate dev_info structure.\n");
 558                 return -ENOMEM;
 559         }
 560
 561         mutex_init(&dev_info->bulk_mutex);
 562
 563         dev_info->udev = usb_get_dev(interface_to_usbdev(interface));
 564         dev_info->interface = interface;
 565
 566         printk("DisplayLink device attached\n");
 567
 568         /* add framebuffer info to usb interface */
 569         usb_set_intfdata(interface, dev_info);
 570
 571         dev_info->buf = kmalloc(BUF_SIZE, GFP_KERNEL);
 572         /* usb_buffer_alloc(dev_info->udev, BUF_SIZE , GFP_KERNEL, &dev_info->tx_urb->transfer_dma); */
 573
 574         if (dev_info->buf == NULL) {
 575                 printk("unable to allocate memory for dlfb commands\n");
 576                 goto out;
 577         }
 578         dev_info->bufend = dev_info->buf + BUF_SIZE;
 579
 580         dev_info->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 581         usb_fill_bulk_urb(dev_info->tx_urb, dev_info->udev,
 582                           usb_sndbulkpipe(dev_info->udev, 1), dev_info->buf, 0,
 583                           dlfb_bulk_callback, dev_info);
 584
 585         ret =
 586             usb_control_msg(dev_info->udev, usb_rcvctrlpipe(dev_info->udev, 0),
 587                             (0x06), (0x80 | (0x02 << 5)), 0, 0, rbuf, 4, 0);
 588         printk("ret control msg 0: %d %x%x%x%x\n", ret, rbuf[0], rbuf[1],
 589                rbuf[2], rbuf[3]);
 590
 591         for (i = 0; i < 128; i++) {
 592                 ret =
 593                     usb_control_msg(dev_info->udev,
 594                                     usb_rcvctrlpipe(dev_info->udev, 0), (0x02),
 595                                     (0x80 | (0x02 << 5)), i << 8, 0xA1, rbuf, 2,
 596                                     0);
 597                 /* printk("ret control msg edid %d: %d [%d]\n",i, ret, rbuf[1]); */
 598                 dev_info->edid[i] = rbuf[1];
 599         }
 600
 601         info = framebuffer_alloc(sizeof(u32) * 256, &dev_info->udev->dev);
 602
 603         if (!info) {
 604                 printk("non posso allocare il framebuffer displaylink");
 605                 goto out;
 606         }
 607
 608         fb_parse_edid(dev_info->edid, &info->var);
 609
 610         printk("EDID XRES %d YRES %d\n", info->var.xres, info->var.yres);
 611
 612         if (dlfb_set_video_mode(dev_info, info->var.xres, info->var.yres) != 0)
 613                 goto out;
 614
 615         printk("found valid mode...%d\n", info->var.pixclock);
 616
 617         info->pseudo_palette = info->par;
 618         info->par = dev_info;
 619
 620         dev_info->info = info;
 621
 622         info->flags =
 623             FBINFO_DEFAULT | FBINFO_READS_FAST | FBINFO_HWACCEL_IMAGEBLIT |
 624             FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT;
 625         info->fbops = &dlfb_ops;
 626         info->screen_base = rvmalloc(dev_info->screen_size);
 627
 628         if (info->screen_base == NULL) {
 629                 printk
 630                     ("cannot allocate framebuffer virtual memory of %d bytes\n",
 631                      dev_info->screen_size);
 632                 goto out0;
 633         }
 634
 635         printk("screen base allocated !!!\n");
 636
 637         dev_info->backing_buffer = kzalloc(dev_info->screen_size, GFP_KERNEL);
 638
 639         if (!dev_info->backing_buffer)
 640                 printk("non posso allocare il backing buffer\n");
 641
 642         /* info->var = dev_info->si; */
 643
 644         info->var.bits_per_pixel = 16;
 645         info->var.activate = FB_ACTIVATE_TEST;
 646         info->var.vmode = FB_VMODE_NONINTERLACED;
 647
 648         info->var.red.offset = 11;
 649         info->var.red.length = 5;
 650         info->var.red.msb_right = 0;
 651
 652         info->var.green.offset = 5;
 653         info->var.green.length = 6;
 654         info->var.green.msb_right = 0;
 655
 656         info->var.blue.offset = 0;
 657         info->var.blue.length = 5;
 658         info->var.blue.msb_right = 0;
 659
 660         /* info->var.pixclock =  (10000000 / FB_W * 1000 / FB_H)/2 ; */
 661
 662         info->fix.smem_start = (unsigned long)info->screen_base;
 663         info->fix.smem_len = PAGE_ALIGN(dev_info->screen_size);
 664         memcpy(info->fix.id, "DisplayLink FB", 14);
 665         info->fix.type = FB_TYPE_PACKED_PIXELS;
 666         info->fix.visual = FB_VISUAL_TRUECOLOR;
 667         info->fix.accel = info->flags;
 668         info->fix.line_length = dev_info->line_length;
 669
 670         if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
 671                 goto out1;
 672
 673         printk("colormap allocated\n");
 674         if (register_framebuffer(info) < 0)
 675                 goto out2;
 676
 677         draw_rect(dev_info, 0, 0, dev_info->info->var.xres,
 678                   dev_info->info->var.yres, 0x30, 0xff, 0x30);
 679
 680         return 0;
 681
 682  out2:
 683         fb_dealloc_cmap(&info->cmap);
 684  out1:
 685         rvfree(info->screen_base, dev_info->screen_size);
 686  out0:
 687         framebuffer_release(info);
 688  out:
 689         usb_set_intfdata(interface, NULL);
 690         usb_put_dev(dev_info->udev);
 691         kfree(dev_info);
 692         return -ENOMEM;
 693
 694 }
 695
 696 static void dlfb_disconnect(struct usb_interface *interface)
 697 {
 698         struct dlfb_data *dev_info = usb_get_intfdata(interface);
 699
 700         mutex_unlock(&dev_info->bulk_mutex);
 701
 702         usb_kill_urb(dev_info->tx_urb);
 703         usb_free_urb(dev_info->tx_urb);
 704         usb_set_intfdata(interface, NULL);
 705         usb_put_dev(dev_info->udev);
 706
 707         if (dev_info->info) {
 708                 unregister_framebuffer(dev_info->info);
 709                 fb_dealloc_cmap(&dev_info->info->cmap);
 710                 rvfree(dev_info->info->screen_base, dev_info->screen_size);
 711                 kfree(dev_info->backing_buffer);
 712                 framebuffer_release(dev_info->info);
 713
 714         }
 715
 716         kfree(dev_info);
 717
 718         printk("DisplayLink device disconnected\n");
 719 }
 720
 721 static struct usb_driver dlfb_driver = {
 722         .name = "udlfb",
 723         .probe = dlfb_probe,
 724         .disconnect = dlfb_disconnect,
 725         .id_table = id_table,
 726 };
 727
 728 static int __init dlfb_init(void)
 729 {
 730         int res;
 731
 732         dlfb_init_modes();
 733
 734         res = usb_register(&dlfb_driver);
 735         if (res)
 736                 err("usb_register failed. Error number %d", res);
 737
 738         printk("VMODES initialized\n");
 739
 740         return res;
 741 }
 742
 743 static void __exit dlfb_exit(void)
 744 {
 745         usb_deregister(&dlfb_driver);
 746 }
 747
 748 module_init(dlfb_init);
 749 module_exit(dlfb_exit);
 750
 751 MODULE_AUTHOR("Roberto De Ioris <roberto@unbit.it>");
 752 MODULE_DESCRIPTION(DRIVER_VERSION);
 753 MODULE_LICENSE("GPL");