drivers/video/via/via-core.c

   1 /*
   2  * Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved.
   3  * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
   4  * Copyright 2009 Jonathan Corbet <corbet@lwn.net>
   5  */
   6
   7 /*
   8  * Core code for the Via multifunction framebuffer device.
   9  */
  10 #include "via-core.h"
  11 #include "via_i2c.h"
  12 #include "via-gpio.h"
  13 #include "global.h"
  14
  15 #include <linux/module.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/platform_device.h>
  18
  19 /*
  20  * The default port config.
  21  */
  22 static struct via_port_cfg adap_configs[] = {
  23         [VIA_PORT_26]   = { VIA_PORT_I2C,  VIA_MODE_OFF, VIASR, 0x26 },
  24         [VIA_PORT_31]   = { VIA_PORT_I2C,  VIA_MODE_I2C, VIASR, 0x31 },
  25         [VIA_PORT_25]   = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x25 },
  26         [VIA_PORT_2C]   = { VIA_PORT_GPIO, VIA_MODE_I2C, VIASR, 0x2c },
  27         [VIA_PORT_3D]   = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x3d },
  28         { 0, 0, 0, 0 }
  29 };
  30
  31 /*
  32  * We currently only support one viafb device (will there ever be
  33  * more than one?), so just declare it globally here.
  34  */
  35 static struct viafb_dev global_dev;
  36
  37
  38 /*
  39  * Basic register access; spinlock required.
  40  */
  41 static inline void viafb_mmio_write(int reg, u32 v)
  42 {
  43         iowrite32(v, global_dev.engine_mmio + reg);
  44 }
  45
  46 static inline int viafb_mmio_read(int reg)
  47 {
  48         return ioread32(global_dev.engine_mmio + reg);
  49 }
  50
  51 /* ---------------------------------------------------------------------- */
  52 /*
  53  * Interrupt management.  We have a single IRQ line for a lot of
  54  * different functions, so we need to share it.  The design here
  55  * is that we don't want to reimplement the shared IRQ code here;
  56  * we also want to avoid having contention for a single handler thread.
  57  * So each subdev driver which needs interrupts just requests
  58  * them directly from the kernel.  We just have what's needed for
  59  * overall access to the interrupt control register.
  60  */
  61
  62 /*
  63  * Which interrupts are enabled now?
  64  */
  65 static u32 viafb_enabled_ints;
  66
  67 static void viafb_int_init(void)
  68 {
  69         viafb_enabled_ints = 0;
  70
  71         viafb_mmio_write(VDE_INTERRUPT, 0);
  72 }
  73
  74 /*
  75  * Allow subdevs to ask for specific interrupts to be enabled.  These
  76  * functions must be called with reg_lock held
  77  */
  78 void viafb_irq_enable(u32 mask)
  79 {
  80         viafb_enabled_ints |= mask;
  81         viafb_mmio_write(VDE_INTERRUPT, viafb_enabled_ints | VDE_I_ENABLE);
  82 }
  83 EXPORT_SYMBOL_GPL(viafb_irq_enable);
  84
  85 void viafb_irq_disable(u32 mask)
  86 {
  87         viafb_enabled_ints &= ~mask;
  88         if (viafb_enabled_ints == 0)
  89                 viafb_mmio_write(VDE_INTERRUPT, 0);  /* Disable entirely */
  90         else
  91                 viafb_mmio_write(VDE_INTERRUPT,
  92                                 viafb_enabled_ints | VDE_I_ENABLE);
  93 }
  94 EXPORT_SYMBOL_GPL(viafb_irq_disable);
  95
  96 /* ---------------------------------------------------------------------- */
  97 /*
  98  * Access to the DMA engine.  This currently provides what the camera
  99  * driver needs (i.e. outgoing only) but is easily expandable if need
 100  * be.
 101  */
 102
 103 /*
 104  * There are four DMA channels in the vx855.  For now, we only
 105  * use one of them, though.  Most of the time, the DMA channel
 106  * will be idle, so we keep the IRQ handler unregistered except
 107  * when some subsystem has indicated an interest.
 108  */
 109 static int viafb_dma_users;
 110 static DECLARE_COMPLETION(viafb_dma_completion);
 111 /*
 112  * This mutex protects viafb_dma_users and our global interrupt
 113  * registration state; it also serializes access to the DMA
 114  * engine.
 115  */
 116 static DEFINE_MUTEX(viafb_dma_lock);
 117
 118 /*
 119  * The VX855 DMA descriptor (used for s/g transfers) looks
 120  * like this.
 121  */
 122 struct viafb_vx855_dma_descr {
 123         u32     addr_low;       /* Low part of phys addr */
 124         u32     addr_high;      /* High 12 bits of addr */
 125         u32     fb_offset;      /* Offset into FB memory */
 126         u32     seg_size;       /* Size, 16-byte units */
 127         u32     tile_mode;      /* "tile mode" setting */
 128         u32     next_desc_low;  /* Next descriptor addr */
 129         u32     next_desc_high;
 130         u32     pad;            /* Fill out to 64 bytes */
 131 };
 132
 133 /*
 134  * Flags added to the "next descriptor low" pointers
 135  */
 136 #define VIAFB_DMA_MAGIC         0x01  /* ??? Just has to be there */
 137 #define VIAFB_DMA_FINAL_SEGMENT 0x02  /* Final segment */
 138
 139 /*
 140  * The completion IRQ handler.
 141  */
 142 static irqreturn_t viafb_dma_irq(int irq, void *data)
 143 {
 144         int csr;
 145         irqreturn_t ret = IRQ_NONE;
 146
 147         spin_lock(&global_dev.reg_lock);
 148         csr = viafb_mmio_read(VDMA_CSR0);
 149         if (csr & VDMA_C_DONE) {
 150                 viafb_mmio_write(VDMA_CSR0, VDMA_C_DONE);
 151                 complete(&viafb_dma_completion);
 152                 ret = IRQ_HANDLED;
 153         }
 154         spin_unlock(&global_dev.reg_lock);
 155         return ret;
 156 }
 157
 158 /*
 159  * Indicate a need for DMA functionality.
 160  */
 161 int viafb_request_dma(void)
 162 {
 163         int ret = 0;
 164
 165         /*
 166          * Only VX855 is supported currently.
 167          */
 168         if (global_dev.chip_type != UNICHROME_VX855)
 169                 return -ENODEV;
 170         /*
 171          * Note the new user and set up our interrupt handler
 172          * if need be.
 173          */
 174         mutex_lock(&viafb_dma_lock);
 175         viafb_dma_users++;
 176         if (viafb_dma_users == 1) {
 177                 ret = request_irq(global_dev.pdev->irq, viafb_dma_irq,
 178                                 IRQF_SHARED, "via-dma", &viafb_dma_users);
 179                 if (ret)
 180                         viafb_dma_users--;
 181                 else
 182                         viafb_irq_enable(VDE_I_DMA0TDEN);
 183         }
 184         mutex_unlock(&viafb_dma_lock);
 185         return ret;
 186 }
 187 EXPORT_SYMBOL_GPL(viafb_request_dma);
 188
 189 void viafb_release_dma(void)
 190 {
 191         mutex_lock(&viafb_dma_lock);
 192         viafb_dma_users--;
 193         if (viafb_dma_users == 0) {
 194                 viafb_irq_disable(VDE_I_DMA0TDEN);
 195                 free_irq(global_dev.pdev->irq, &viafb_dma_users);
 196         }
 197         mutex_unlock(&viafb_dma_lock);
 198 }
 199 EXPORT_SYMBOL_GPL(viafb_release_dma);
 200
 201
 202 #if 0
 203 /*
 204  * Copy a single buffer from FB memory, synchronously.  This code works
 205  * but is not currently used.
 206  */
 207 void viafb_dma_copy_out(unsigned int offset, dma_addr_t paddr, int len)
 208 {
 209         unsigned long flags;
 210         int csr;
 211
 212         mutex_lock(&viafb_dma_lock);
 213         init_completion(&viafb_dma_completion);
 214         /*
 215          * Program the controller.
 216          */
 217         spin_lock_irqsave(&global_dev.reg_lock, flags);
 218         viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_DONE);
 219         /* Enable ints; must happen after CSR0 write! */
 220         viafb_mmio_write(VDMA_MR0, VDMA_MR_TDIE);
 221         viafb_mmio_write(VDMA_MARL0, (int) (paddr & 0xfffffff0));
 222         viafb_mmio_write(VDMA_MARH0, (int) ((paddr >> 28) & 0xfff));
 223         /* Data sheet suggests DAR0 should be <<4, but it lies */
 224         viafb_mmio_write(VDMA_DAR0, offset);
 225         viafb_mmio_write(VDMA_DQWCR0, len >> 4);
 226         viafb_mmio_write(VDMA_TMR0, 0);
 227         viafb_mmio_write(VDMA_DPRL0, 0);
 228         viafb_mmio_write(VDMA_DPRH0, 0);
 229         viafb_mmio_write(VDMA_PMR0, 0);
 230         csr = viafb_mmio_read(VDMA_CSR0);
 231         viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_START);
 232         spin_unlock_irqrestore(&global_dev.reg_lock, flags);
 233         /*
 234          * Now we just wait until the interrupt handler says
 235          * we're done.
 236          */
 237         wait_for_completion_interruptible(&viafb_dma_completion);
 238         viafb_mmio_write(VDMA_MR0, 0); /* Reset int enable */
 239         mutex_unlock(&viafb_dma_lock);
 240 }
 241 EXPORT_SYMBOL_GPL(viafb_dma_copy_out);
 242 #endif
 243
 244 /*
 245  * Do a scatter/gather DMA copy from FB memory.  You must have done
 246  * a successful call to viafb_request_dma() first.
 247  */
 248 int viafb_dma_copy_out_sg(unsigned int offset, struct scatterlist *sg, int nsg)
 249 {
 250         struct viafb_vx855_dma_descr *descr;
 251         void *descrpages;
 252         dma_addr_t descr_handle;
 253         unsigned long flags;
 254         int i;
 255         struct scatterlist *sgentry;
 256         dma_addr_t nextdesc;
 257
 258         /*
 259          * Get a place to put the descriptors.
 260          */
 261         descrpages = dma_alloc_coherent(&global_dev.pdev->dev,
 262                         nsg*sizeof(struct viafb_vx855_dma_descr),
 263                         &descr_handle, GFP_KERNEL);
 264         if (descrpages == NULL) {
 265                 dev_err(&global_dev.pdev->dev, "Unable to get descr page.\n");
 266                 return -ENOMEM;
 267         }
 268         mutex_lock(&viafb_dma_lock);
 269         /*
 270          * Fill them in.
 271          */
 272         descr = descrpages;
 273         nextdesc = descr_handle + sizeof(struct viafb_vx855_dma_descr);
 274         for_each_sg(sg, sgentry, nsg, i) {
 275                 dma_addr_t paddr = sg_dma_address(sgentry);
 276                 descr->addr_low = paddr & 0xfffffff0;
 277                 descr->addr_high = ((u64) paddr >> 32) & 0x0fff;
 278                 descr->fb_offset = offset;
 279                 descr->seg_size = sg_dma_len(sgentry) >> 4;
 280                 descr->tile_mode = 0;
 281                 descr->next_desc_low = (nextdesc&0xfffffff0) | VIAFB_DMA_MAGIC;
 282                 descr->next_desc_high = ((u64) nextdesc >> 32) & 0x0fff;
 283                 descr->pad = 0xffffffff;  /* VIA driver does this */
 284                 offset += sg_dma_len(sgentry);
 285                 nextdesc += sizeof(struct viafb_vx855_dma_descr);
 286                 descr++;
 287         }
 288         descr[-1].next_desc_low = VIAFB_DMA_FINAL_SEGMENT|VIAFB_DMA_MAGIC;
 289         /*
 290          * Program the engine.
 291          */
 292         spin_lock_irqsave(&global_dev.reg_lock, flags);
 293         init_completion(&viafb_dma_completion);
 294         viafb_mmio_write(VDMA_DQWCR0, 0);
 295         viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_DONE);
 296         viafb_mmio_write(VDMA_MR0, VDMA_MR_TDIE | VDMA_MR_CHAIN);
 297         viafb_mmio_write(VDMA_DPRL0, descr_handle | VIAFB_DMA_MAGIC);
 298         viafb_mmio_write(VDMA_DPRH0,
 299                         (((u64)descr_handle >> 32) & 0x0fff) | 0xf0000);
 300         (void) viafb_mmio_read(VDMA_CSR0);
 301         viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_START);
 302         spin_unlock_irqrestore(&global_dev.reg_lock, flags);
 303         /*
 304          * Now we just wait until the interrupt handler says
 305          * we're done.  Except that, actually, we need to wait a little
 306          * longer: the interrupts seem to jump the gun a little and we
 307          * get corrupted frames sometimes.
 308          */
 309         wait_for_completion_timeout(&viafb_dma_completion, 1);
 310         msleep(1);
 311         if ((viafb_mmio_read(VDMA_CSR0)&VDMA_C_DONE) == 0)
 312                 printk(KERN_ERR "VIA DMA timeout!\n");
 313         /*
 314          * Clean up and we're done.
 315          */
 316         viafb_mmio_write(VDMA_CSR0, VDMA_C_DONE);
 317         viafb_mmio_write(VDMA_MR0, 0); /* Reset int enable */
 318         mutex_unlock(&viafb_dma_lock);
 319         dma_free_coherent(&global_dev.pdev->dev,
 320                         nsg*sizeof(struct viafb_vx855_dma_descr), descrpages,
 321                         descr_handle);
 322         return 0;
 323 }
 324 EXPORT_SYMBOL_GPL(viafb_dma_copy_out_sg);
 325
 326
 327 /* ---------------------------------------------------------------------- */
 328 /*
 329  * Figure out how big our framebuffer memory is.  Kind of ugly,
 330  * but evidently we can't trust the information found in the
 331  * fbdev configuration area.
 332  */
 333 static u16 via_function3[] = {
 334         CLE266_FUNCTION3, KM400_FUNCTION3, CN400_FUNCTION3, CN700_FUNCTION3,
 335         CX700_FUNCTION3, KM800_FUNCTION3, KM890_FUNCTION3, P4M890_FUNCTION3,
 336         P4M900_FUNCTION3, VX800_FUNCTION3, VX855_FUNCTION3,
 337 };
 338
 339 /* Get the BIOS-configured framebuffer size from PCI configuration space
 340  * of function 3 in the respective chipset */
 341 static int viafb_get_fb_size_from_pci(int chip_type)
 342 {
 343         int i;
 344         u8 offset = 0;
 345         u32 FBSize;
 346         u32 VideoMemSize;
 347
 348         /* search for the "FUNCTION3" device in this chipset */
 349         for (i = 0; i < ARRAY_SIZE(via_function3); i++) {
 350                 struct pci_dev *pdev;
 351
 352                 pdev = pci_get_device(PCI_VENDOR_ID_VIA, via_function3[i],
 353                                       NULL);
 354                 if (!pdev)
 355                         continue;
 356
 357                 DEBUG_MSG(KERN_INFO "Device ID = %x\n", pdev->device);
 358
 359                 switch (pdev->device) {
 360                 case CLE266_FUNCTION3:
 361                 case KM400_FUNCTION3:
 362                         offset = 0xE0;
 363                         break;
 364                 case CN400_FUNCTION3:
 365                 case CN700_FUNCTION3:
 366                 case CX700_FUNCTION3:
 367                 case KM800_FUNCTION3:
 368                 case KM890_FUNCTION3:
 369                 case P4M890_FUNCTION3:
 370                 case P4M900_FUNCTION3:
 371                 case VX800_FUNCTION3:
 372                 case VX855_FUNCTION3:
 373                 /*case CN750_FUNCTION3: */
 374                         offset = 0xA0;
 375                         break;
 376                 }
 377
 378                 if (!offset)
 379                         break;
 380
 381                 pci_read_config_dword(pdev, offset, &FBSize);
 382                 pci_dev_put(pdev);
 383         }
 384
 385         if (!offset) {
 386                 printk(KERN_ERR "cannot determine framebuffer size\n");
 387                 return -EIO;
 388         }
 389
 390         FBSize = FBSize & 0x00007000;
 391         DEBUG_MSG(KERN_INFO "FB Size = %x\n", FBSize);
 392
 393         if (chip_type < UNICHROME_CX700) {
 394                 switch (FBSize) {
 395                 case 0x00004000:
 396                         VideoMemSize = (16 << 20);      /*16M */
 397                         break;
 398
 399                 case 0x00005000:
 400                         VideoMemSize = (32 << 20);      /*32M */
 401                         break;
 402
 403                 case 0x00006000:
 404                         VideoMemSize = (64 << 20);      /*64M */
 405                         break;
 406
 407                 default:
 408                         VideoMemSize = (32 << 20);      /*32M */
 409                         break;
 410                 }
 411         } else {
 412                 switch (FBSize) {
 413                 case 0x00001000:
 414                         VideoMemSize = (8 << 20);       /*8M */
 415                         break;
 416
 417                 case 0x00002000:
 418                         VideoMemSize = (16 << 20);      /*16M */
 419                         break;
 420
 421                 case 0x00003000:
 422                         VideoMemSize = (32 << 20);      /*32M */
 423                         break;
 424
 425                 case 0x00004000:
 426                         VideoMemSize = (64 << 20);      /*64M */
 427                         break;
 428
 429                 case 0x00005000:
 430                         VideoMemSize = (128 << 20);     /*128M */
 431                         break;
 432
 433                 case 0x00006000:
 434                         VideoMemSize = (256 << 20);     /*256M */
 435                         break;
 436
 437                 case 0x00007000:        /* Only on VX855/875 */
 438                         VideoMemSize = (512 << 20);     /*512M */
 439                         break;
 440
 441                 default:
 442                         VideoMemSize = (32 << 20);      /*32M */
 443                         break;
 444                 }
 445         }
 446
 447         return VideoMemSize;
 448 }
 449
 450
 451 /*
 452  * Figure out and map our MMIO regions.
 453  */
 454 static int __devinit via_pci_setup_mmio(struct viafb_dev *vdev)
 455 {
 456         int ret;
 457         /*
 458          * Hook up to the device registers.  Note that we soldier
 459          * on if it fails; the framebuffer can operate (without
 460          * acceleration) without this region.
 461          */
 462         vdev->engine_start = pci_resource_start(vdev->pdev, 1);
 463         vdev->engine_len = pci_resource_len(vdev->pdev, 1);
 464         vdev->engine_mmio = ioremap_nocache(vdev->engine_start,
 465                         vdev->engine_len);
 466         if (vdev->engine_mmio == NULL)
 467                 dev_err(&vdev->pdev->dev,
 468                                 "Unable to map engine MMIO; operation will be "
 469                                 "slow and crippled.\n");
 470         /*
 471          * Map in framebuffer memory.  For now, failure here is
 472          * fatal.  Unfortunately, in the absence of significant
 473          * vmalloc space, failure here is also entirely plausible.
 474          * Eventually we want to move away from mapping this
 475          * entire region.
 476          */
 477         vdev->fbmem_start = pci_resource_start(vdev->pdev, 0);
 478         ret = vdev->fbmem_len = viafb_get_fb_size_from_pci(vdev->chip_type);
 479         if (ret < 0)
 480                 goto out_unmap;
 481         vdev->fbmem = ioremap_nocache(vdev->fbmem_start, vdev->fbmem_len);
 482         if (vdev->fbmem == NULL) {
 483                 ret = -ENOMEM;
 484                 goto out_unmap;
 485         }
 486         return 0;
 487 out_unmap:
 488         iounmap(vdev->engine_mmio);
 489         return ret;
 490 }
 491
 492 static void __devexit via_pci_teardown_mmio(struct viafb_dev *vdev)
 493 {
 494         iounmap(vdev->fbmem);
 495         iounmap(vdev->engine_mmio);
 496 }
 497
 498 /*
 499  * Create our subsidiary devices.
 500  */
 501 static struct viafb_subdev_info {
 502         char *name;
 503         struct platform_device *platdev;
 504 } viafb_subdevs[] = {
 505         {
 506                 .name = "viafb-gpio",
 507         },
 508         {
 509                 .name = "viafb-i2c",
 510         }
 511 };
 512 #define N_SUBDEVS ARRAY_SIZE(viafb_subdevs)
 513
 514 static int __devinit via_create_subdev(struct viafb_dev *vdev,
 515                 struct viafb_subdev_info *info)
 516 {
 517         int ret;
 518
 519         info->platdev = platform_device_alloc(info->name, -1);
 520         if (!info->platdev) {
 521                 dev_err(&vdev->pdev->dev, "Unable to allocate pdev %s\n",
 522                         info->name);
 523                 return -ENOMEM;
 524         }
 525         info->platdev->dev.parent = &vdev->pdev->dev;
 526         info->platdev->dev.platform_data = vdev;
 527         ret = platform_device_add(info->platdev);
 528         if (ret) {
 529                 dev_err(&vdev->pdev->dev, "Unable to add pdev %s\n",
 530                                 info->name);
 531                 platform_device_put(info->platdev);
 532                 info->platdev = NULL;
 533         }
 534         return ret;
 535 }
 536
 537 static int __devinit via_setup_subdevs(struct viafb_dev *vdev)
 538 {
 539         int i;
 540
 541         /*
 542          * Ignore return values.  Even if some of the devices
 543          * fail to be created, we'll still be able to use some
 544          * of the rest.
 545          */
 546         for (i = 0; i < N_SUBDEVS; i++)
 547                 via_create_subdev(vdev, viafb_subdevs + i);
 548         return 0;
 549 }
 550
 551 static void __devexit via_teardown_subdevs(void)
 552 {
 553         int i;
 554
 555         for (i = 0; i < N_SUBDEVS; i++)
 556                 if (viafb_subdevs[i].platdev) {
 557                         viafb_subdevs[i].platdev->dev.platform_data = NULL;
 558                         platform_device_unregister(viafb_subdevs[i].platdev);
 559                 }
 560 }
 561
 562
 563 static int __devinit via_pci_probe(struct pci_dev *pdev,
 564                 const struct pci_device_id *ent)
 565 {
 566         int ret;
 567
 568         ret = pci_enable_device(pdev);
 569         if (ret)
 570                 return ret;
 571         /*
 572          * Global device initialization.
 573          */
 574         memset(&global_dev, 0, sizeof(global_dev));
 575         global_dev.pdev = pdev;
 576         global_dev.chip_type = ent->driver_data;
 577         global_dev.port_cfg = adap_configs;
 578         spin_lock_init(&global_dev.reg_lock);
 579         ret = via_pci_setup_mmio(&global_dev);
 580         if (ret)
 581                 goto out_disable;
 582         /*
 583          * Set up interrupts and create our subdevices.  Continue even if
 584          * some things fail.
 585          */
 586         viafb_int_init();
 587         via_setup_subdevs(&global_dev);
 588         /*
 589          * Set up the framebuffer device
 590          */
 591         ret = via_fb_pci_probe(&global_dev);
 592         if (ret)
 593                 goto out_subdevs;
 594         return 0;
 595
 596 out_subdevs:
 597         via_teardown_subdevs();
 598         via_pci_teardown_mmio(&global_dev);
 599 out_disable:
 600         pci_disable_device(pdev);
 601         return ret;
 602 }
 603
 604 static void __devexit via_pci_remove(struct pci_dev *pdev)
 605 {
 606         via_teardown_subdevs();
 607         via_fb_pci_remove(pdev);
 608         via_pci_teardown_mmio(&global_dev);
 609         pci_disable_device(pdev);
 610 }
 611
 612
 613 static struct pci_device_id via_pci_table[] __devinitdata = {
 614         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CLE266_DID),
 615           .driver_data = UNICHROME_CLE266 },
 616         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_PM800_DID),
 617           .driver_data = UNICHROME_PM800 },
 618         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K400_DID),
 619           .driver_data = UNICHROME_K400 },
 620         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K800_DID),
 621           .driver_data = UNICHROME_K800 },
 622         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_P4M890_DID),
 623           .driver_data = UNICHROME_CN700 },
 624         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K8M890_DID),
 625           .driver_data = UNICHROME_K8M890 },
 626         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CX700_DID),
 627           .driver_data = UNICHROME_CX700 },
 628         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_P4M900_DID),
 629           .driver_data = UNICHROME_P4M900 },
 630         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CN750_DID),
 631           .driver_data = UNICHROME_CN750 },
 632         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX800_DID),
 633           .driver_data = UNICHROME_VX800 },
 634         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX855_DID),
 635           .driver_data = UNICHROME_VX855 },
 636         { }
 637 };
 638 MODULE_DEVICE_TABLE(pci, via_pci_table);
 639
 640 static struct pci_driver via_driver = {
 641         .name           = "viafb",
 642         .id_table       = via_pci_table,
 643         .probe          = via_pci_probe,
 644         .remove         = __devexit_p(via_pci_remove),
 645 };
 646
 647 static int __init via_core_init(void)
 648 {
 649         int ret;
 650
 651         ret = viafb_init();
 652         if (ret)
 653                 return ret;
 654         viafb_i2c_init();
 655         viafb_gpio_init();
 656         return pci_register_driver(&via_driver);
 657 }
 658
 659 static void __exit via_core_exit(void)
 660 {
 661         pci_unregister_driver(&via_driver);
 662         viafb_gpio_exit();
 663         viafb_i2c_exit();
 664         viafb_exit();
 665 }
 666
 667 module_init(via_core_init);
 668 module_exit(via_core_exit);