drivers/video/fbdev/via/via-core.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved.
   4  * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
   5  * Copyright 2009 Jonathan Corbet <corbet@lwn.net>
   6  */
   7
   8 /*
   9  * Core code for the Via multifunction framebuffer device.
  10  */
  11 #include <linux/aperture.h>
  12 #include <linux/via-core.h>
  13 #include <linux/via_i2c.h>
  14 #include "via-gpio.h"
  15 #include "global.h"
  16
  17 #include <linux/module.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/list.h>
  21 #include <linux/pm.h>
  22
  23 /*
  24  * The default port config.
  25  */
  26 static struct via_port_cfg adap_configs[] = {
  27         [VIA_PORT_26]   = { VIA_PORT_I2C,  VIA_MODE_I2C, VIASR, 0x26 },
  28         [VIA_PORT_31]   = { VIA_PORT_I2C,  VIA_MODE_I2C, VIASR, 0x31 },
  29         [VIA_PORT_25]   = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x25 },
  30         [VIA_PORT_2C]   = { VIA_PORT_GPIO, VIA_MODE_I2C, VIASR, 0x2c },
  31         [VIA_PORT_3D]   = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x3d },
  32         { 0, 0, 0, 0 }
  33 };
  34
  35 /*
  36  * The OLPC XO-1.5 puts the camera power and reset lines onto
  37  * GPIO 2C.
  38  */
  39 static struct via_port_cfg olpc_adap_configs[] = {
  40         [VIA_PORT_26]   = { VIA_PORT_I2C,  VIA_MODE_I2C, VIASR, 0x26 },
  41         [VIA_PORT_31]   = { VIA_PORT_I2C,  VIA_MODE_I2C, VIASR, 0x31 },
  42         [VIA_PORT_25]   = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x25 },
  43         [VIA_PORT_2C]   = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x2c },
  44         [VIA_PORT_3D]   = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x3d },
  45         { 0, 0, 0, 0 }
  46 };
  47
  48 /*
  49  * We currently only support one viafb device (will there ever be
  50  * more than one?), so just declare it globally here.
  51  */
  52 static struct viafb_dev global_dev;
  53
  54
  55 /*
  56  * Basic register access; spinlock required.
  57  */
  58 static inline void viafb_mmio_write(int reg, u32 v)
  59 {
  60         iowrite32(v, global_dev.engine_mmio + reg);
  61 }
  62
  63 static inline int viafb_mmio_read(int reg)
  64 {
  65         return ioread32(global_dev.engine_mmio + reg);
  66 }
  67
  68 /* ---------------------------------------------------------------------- */
  69 /*
  70  * Interrupt management.  We have a single IRQ line for a lot of
  71  * different functions, so we need to share it.  The design here
  72  * is that we don't want to reimplement the shared IRQ code here;
  73  * we also want to avoid having contention for a single handler thread.
  74  * So each subdev driver which needs interrupts just requests
  75  * them directly from the kernel.  We just have what's needed for
  76  * overall access to the interrupt control register.
  77  */
  78
  79 /*
  80  * Which interrupts are enabled now?
  81  */
  82 static u32 viafb_enabled_ints;
  83
  84 static void viafb_int_init(void)
  85 {
  86         viafb_enabled_ints = 0;
  87
  88         viafb_mmio_write(VDE_INTERRUPT, 0);
  89 }
  90
  91 /*
  92  * Allow subdevs to ask for specific interrupts to be enabled.  These
  93  * functions must be called with reg_lock held
  94  */
  95 void viafb_irq_enable(u32 mask)
  96 {
  97         viafb_enabled_ints |= mask;
  98         viafb_mmio_write(VDE_INTERRUPT, viafb_enabled_ints | VDE_I_ENABLE);
  99 }
 100 EXPORT_SYMBOL_GPL(viafb_irq_enable);
 101
 102 void viafb_irq_disable(u32 mask)
 103 {
 104         viafb_enabled_ints &= ~mask;
 105         if (viafb_enabled_ints == 0)
 106                 viafb_mmio_write(VDE_INTERRUPT, 0);  /* Disable entirely */
 107         else
 108                 viafb_mmio_write(VDE_INTERRUPT,
 109                                 viafb_enabled_ints | VDE_I_ENABLE);
 110 }
 111 EXPORT_SYMBOL_GPL(viafb_irq_disable);
 112
 113 /* ---------------------------------------------------------------------- */
 114 /*
 115  * Currently, the camera driver is the only user of the DMA code, so we
 116  * only compile it in if the camera driver is being built.  Chances are,
 117  * most viafb systems will not need to have this extra code for a while.
 118  * As soon as another user comes long, the ifdef can be removed.
 119  */
 120 #if IS_ENABLED(CONFIG_VIDEO_VIA_CAMERA)
 121 /*
 122  * Access to the DMA engine.  This currently provides what the camera
 123  * driver needs (i.e. outgoing only) but is easily expandable if need
 124  * be.
 125  */
 126
 127 /*
 128  * There are four DMA channels in the vx855.  For now, we only
 129  * use one of them, though.  Most of the time, the DMA channel
 130  * will be idle, so we keep the IRQ handler unregistered except
 131  * when some subsystem has indicated an interest.
 132  */
 133 static int viafb_dma_users;
 134 static DECLARE_COMPLETION(viafb_dma_completion);
 135 /*
 136  * This mutex protects viafb_dma_users and our global interrupt
 137  * registration state; it also serializes access to the DMA
 138  * engine.
 139  */
 140 static DEFINE_MUTEX(viafb_dma_lock);
 141
 142 /*
 143  * The VX855 DMA descriptor (used for s/g transfers) looks
 144  * like this.
 145  */
 146 struct viafb_vx855_dma_descr {
 147         u32     addr_low;       /* Low part of phys addr */
 148         u32     addr_high;      /* High 12 bits of addr */
 149         u32     fb_offset;      /* Offset into FB memory */
 150         u32     seg_size;       /* Size, 16-byte units */
 151         u32     tile_mode;      /* "tile mode" setting */
 152         u32     next_desc_low;  /* Next descriptor addr */
 153         u32     next_desc_high;
 154         u32     pad;            /* Fill out to 64 bytes */
 155 };
 156
 157 /*
 158  * Flags added to the "next descriptor low" pointers
 159  */
 160 #define VIAFB_DMA_MAGIC         0x01  /* ??? Just has to be there */
 161 #define VIAFB_DMA_FINAL_SEGMENT 0x02  /* Final segment */
 162
 163 /*
 164  * The completion IRQ handler.
 165  */
 166 static irqreturn_t viafb_dma_irq(int irq, void *data)
 167 {
 168         int csr;
 169         irqreturn_t ret = IRQ_NONE;
 170
 171         spin_lock(&global_dev.reg_lock);
 172         csr = viafb_mmio_read(VDMA_CSR0);
 173         if (csr & VDMA_C_DONE) {
 174                 viafb_mmio_write(VDMA_CSR0, VDMA_C_DONE);
 175                 complete(&viafb_dma_completion);
 176                 ret = IRQ_HANDLED;
 177         }
 178         spin_unlock(&global_dev.reg_lock);
 179         return ret;
 180 }
 181
 182 /*
 183  * Indicate a need for DMA functionality.
 184  */
 185 int viafb_request_dma(void)
 186 {
 187         int ret = 0;
 188
 189         /*
 190          * Only VX855 is supported currently.
 191          */
 192         if (global_dev.chip_type != UNICHROME_VX855)
 193                 return -ENODEV;
 194         /*
 195          * Note the new user and set up our interrupt handler
 196          * if need be.
 197          */
 198         mutex_lock(&viafb_dma_lock);
 199         viafb_dma_users++;
 200         if (viafb_dma_users == 1) {
 201                 ret = request_irq(global_dev.pdev->irq, viafb_dma_irq,
 202                                 IRQF_SHARED, "via-dma", &viafb_dma_users);
 203                 if (ret)
 204                         viafb_dma_users--;
 205                 else
 206                         viafb_irq_enable(VDE_I_DMA0TDEN);
 207         }
 208         mutex_unlock(&viafb_dma_lock);
 209         return ret;
 210 }
 211 EXPORT_SYMBOL_GPL(viafb_request_dma);
 212
 213 void viafb_release_dma(void)
 214 {
 215         mutex_lock(&viafb_dma_lock);
 216         viafb_dma_users--;
 217         if (viafb_dma_users == 0) {
 218                 viafb_irq_disable(VDE_I_DMA0TDEN);
 219                 free_irq(global_dev.pdev->irq, &viafb_dma_users);
 220         }
 221         mutex_unlock(&viafb_dma_lock);
 222 }
 223 EXPORT_SYMBOL_GPL(viafb_release_dma);
 224
 225 /*
 226  * Do a scatter/gather DMA copy from FB memory.  You must have done
 227  * a successful call to viafb_request_dma() first.
 228  */
 229 int viafb_dma_copy_out_sg(unsigned int offset, struct scatterlist *sg, int nsg)
 230 {
 231         struct viafb_vx855_dma_descr *descr;
 232         void *descrpages;
 233         dma_addr_t descr_handle;
 234         unsigned long flags;
 235         int i;
 236         struct scatterlist *sgentry;
 237         dma_addr_t nextdesc;
 238
 239         /*
 240          * Get a place to put the descriptors.
 241          */
 242         descrpages = dma_alloc_coherent(&global_dev.pdev->dev,
 243                         nsg*sizeof(struct viafb_vx855_dma_descr),
 244                         &descr_handle, GFP_KERNEL);
 245         if (descrpages == NULL) {
 246                 dev_err(&global_dev.pdev->dev, "Unable to get descr page.\n");
 247                 return -ENOMEM;
 248         }
 249         mutex_lock(&viafb_dma_lock);
 250         /*
 251          * Fill them in.
 252          */
 253         descr = descrpages;
 254         nextdesc = descr_handle + sizeof(struct viafb_vx855_dma_descr);
 255         for_each_sg(sg, sgentry, nsg, i) {
 256                 dma_addr_t paddr = sg_dma_address(sgentry);
 257                 descr->addr_low = paddr & 0xfffffff0;
 258                 descr->addr_high = ((u64) paddr >> 32) & 0x0fff;
 259                 descr->fb_offset = offset;
 260                 descr->seg_size = sg_dma_len(sgentry) >> 4;
 261                 descr->tile_mode = 0;
 262                 descr->next_desc_low = (nextdesc&0xfffffff0) | VIAFB_DMA_MAGIC;
 263                 descr->next_desc_high = ((u64) nextdesc >> 32) & 0x0fff;
 264                 descr->pad = 0xffffffff;  /* VIA driver does this */
 265                 offset += sg_dma_len(sgentry);
 266                 nextdesc += sizeof(struct viafb_vx855_dma_descr);
 267                 descr++;
 268         }
 269         descr[-1].next_desc_low = VIAFB_DMA_FINAL_SEGMENT|VIAFB_DMA_MAGIC;
 270         /*
 271          * Program the engine.
 272          */
 273         spin_lock_irqsave(&global_dev.reg_lock, flags);
 274         init_completion(&viafb_dma_completion);
 275         viafb_mmio_write(VDMA_DQWCR0, 0);
 276         viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_DONE);
 277         viafb_mmio_write(VDMA_MR0, VDMA_MR_TDIE | VDMA_MR_CHAIN);
 278         viafb_mmio_write(VDMA_DPRL0, descr_handle | VIAFB_DMA_MAGIC);
 279         viafb_mmio_write(VDMA_DPRH0,
 280                         (((u64)descr_handle >> 32) & 0x0fff) | 0xf0000);
 281         (void) viafb_mmio_read(VDMA_CSR0);
 282         viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_START);
 283         spin_unlock_irqrestore(&global_dev.reg_lock, flags);
 284         /*
 285          * Now we just wait until the interrupt handler says
 286          * we're done.  Except that, actually, we need to wait a little
 287          * longer: the interrupts seem to jump the gun a little and we
 288          * get corrupted frames sometimes.
 289          */
 290         wait_for_completion_timeout(&viafb_dma_completion, 1);
 291         msleep(1);
 292         if ((viafb_mmio_read(VDMA_CSR0)&VDMA_C_DONE) == 0)
 293                 printk(KERN_ERR "VIA DMA timeout!\n");
 294         /*
 295          * Clean up and we're done.
 296          */
 297         viafb_mmio_write(VDMA_CSR0, VDMA_C_DONE);
 298         viafb_mmio_write(VDMA_MR0, 0); /* Reset int enable */
 299         mutex_unlock(&viafb_dma_lock);
 300         dma_free_coherent(&global_dev.pdev->dev,
 301                         nsg*sizeof(struct viafb_vx855_dma_descr), descrpages,
 302                         descr_handle);
 303         return 0;
 304 }
 305 EXPORT_SYMBOL_GPL(viafb_dma_copy_out_sg);
 306 #endif /* CONFIG_VIDEO_VIA_CAMERA */
 307
 308 /* ---------------------------------------------------------------------- */
 309 /*
 310  * Figure out how big our framebuffer memory is.  Kind of ugly,
 311  * but evidently we can't trust the information found in the
 312  * fbdev configuration area.
 313  */
 314 static u16 via_function3[] = {
 315         CLE266_FUNCTION3, KM400_FUNCTION3, CN400_FUNCTION3, CN700_FUNCTION3,
 316         CX700_FUNCTION3, KM800_FUNCTION3, KM890_FUNCTION3, P4M890_FUNCTION3,
 317         P4M900_FUNCTION3, VX800_FUNCTION3, VX855_FUNCTION3, VX900_FUNCTION3,
 318 };
 319
 320 /* Get the BIOS-configured framebuffer size from PCI configuration space
 321  * of function 3 in the respective chipset */
 322 static int viafb_get_fb_size_from_pci(int chip_type)
 323 {
 324         int i;
 325         u8 offset = 0;
 326         u32 FBSize;
 327         u32 VideoMemSize;
 328
 329         /* search for the "FUNCTION3" device in this chipset */
 330         for (i = 0; i < ARRAY_SIZE(via_function3); i++) {
 331                 struct pci_dev *pdev;
 332
 333                 pdev = pci_get_device(PCI_VENDOR_ID_VIA, via_function3[i],
 334                                       NULL);
 335                 if (!pdev)
 336                         continue;
 337
 338                 DEBUG_MSG(KERN_INFO "Device ID = %x\n", pdev->device);
 339
 340                 switch (pdev->device) {
 341                 case CLE266_FUNCTION3:
 342                 case KM400_FUNCTION3:
 343                         offset = 0xE0;
 344                         break;
 345                 case CN400_FUNCTION3:
 346                 case CN700_FUNCTION3:
 347                 case CX700_FUNCTION3:
 348                 case KM800_FUNCTION3:
 349                 case KM890_FUNCTION3:
 350                 case P4M890_FUNCTION3:
 351                 case P4M900_FUNCTION3:
 352                 case VX800_FUNCTION3:
 353                 case VX855_FUNCTION3:
 354                 case VX900_FUNCTION3:
 355                 /*case CN750_FUNCTION3: */
 356                         offset = 0xA0;
 357                         break;
 358                 }
 359
 360                 if (!offset)
 361                         break;
 362
 363                 pci_read_config_dword(pdev, offset, &FBSize);
 364                 pci_dev_put(pdev);
 365         }
 366
 367         if (!offset) {
 368                 printk(KERN_ERR "cannot determine framebuffer size\n");
 369                 return -EIO;
 370         }
 371
 372         FBSize = FBSize & 0x00007000;
 373         DEBUG_MSG(KERN_INFO "FB Size = %x\n", FBSize);
 374
 375         if (chip_type < UNICHROME_CX700) {
 376                 switch (FBSize) {
 377                 case 0x00004000:
 378                         VideoMemSize = (16 << 20);      /*16M */
 379                         break;
 380
 381                 case 0x00005000:
 382                         VideoMemSize = (32 << 20);      /*32M */
 383                         break;
 384
 385                 case 0x00006000:
 386                         VideoMemSize = (64 << 20);      /*64M */
 387                         break;
 388
 389                 default:
 390                         VideoMemSize = (32 << 20);      /*32M */
 391                         break;
 392                 }
 393         } else {
 394                 switch (FBSize) {
 395                 case 0x00001000:
 396                         VideoMemSize = (8 << 20);       /*8M */
 397                         break;
 398
 399                 case 0x00002000:
 400                         VideoMemSize = (16 << 20);      /*16M */
 401                         break;
 402
 403                 case 0x00003000:
 404                         VideoMemSize = (32 << 20);      /*32M */
 405                         break;
 406
 407                 case 0x00004000:
 408                         VideoMemSize = (64 << 20);      /*64M */
 409                         break;
 410
 411                 case 0x00005000:
 412                         VideoMemSize = (128 << 20);     /*128M */
 413                         break;
 414
 415                 case 0x00006000:
 416                         VideoMemSize = (256 << 20);     /*256M */
 417                         break;
 418
 419                 case 0x00007000:        /* Only on VX855/875 */
 420                         VideoMemSize = (512 << 20);     /*512M */
 421                         break;
 422
 423                 default:
 424                         VideoMemSize = (32 << 20);      /*32M */
 425                         break;
 426                 }
 427         }
 428
 429         return VideoMemSize;
 430 }
 431
 432
 433 /*
 434  * Figure out and map our MMIO regions.
 435  */
 436 static int via_pci_setup_mmio(struct viafb_dev *vdev)
 437 {
 438         int ret;
 439         /*
 440          * Hook up to the device registers.  Note that we soldier
 441          * on if it fails; the framebuffer can operate (without
 442          * acceleration) without this region.
 443          */
 444         vdev->engine_start = pci_resource_start(vdev->pdev, 1);
 445         vdev->engine_len = pci_resource_len(vdev->pdev, 1);
 446         vdev->engine_mmio = ioremap(vdev->engine_start,
 447                         vdev->engine_len);
 448         if (vdev->engine_mmio == NULL)
 449                 dev_err(&vdev->pdev->dev,
 450                                 "Unable to map engine MMIO; operation will be "
 451                                 "slow and crippled.\n");
 452         /*
 453          * Map in framebuffer memory.  For now, failure here is
 454          * fatal.  Unfortunately, in the absence of significant
 455          * vmalloc space, failure here is also entirely plausible.
 456          * Eventually we want to move away from mapping this
 457          * entire region.
 458          */
 459         if (vdev->chip_type == UNICHROME_VX900)
 460                 vdev->fbmem_start = pci_resource_start(vdev->pdev, 2);
 461         else
 462                 vdev->fbmem_start = pci_resource_start(vdev->pdev, 0);
 463         ret = vdev->fbmem_len = viafb_get_fb_size_from_pci(vdev->chip_type);
 464         if (ret < 0)
 465                 goto out_unmap;
 466
 467         /* try to map less memory on failure, 8 MB should be still enough */
 468         for (; vdev->fbmem_len >= 8 << 20; vdev->fbmem_len /= 2) {
 469                 vdev->fbmem = ioremap_wc(vdev->fbmem_start, vdev->fbmem_len);
 470                 if (vdev->fbmem)
 471                         break;
 472         }
 473
 474         if (vdev->fbmem == NULL) {
 475                 ret = -ENOMEM;
 476                 goto out_unmap;
 477         }
 478         return 0;
 479 out_unmap:
 480         iounmap(vdev->engine_mmio);
 481         return ret;
 482 }
 483
 484 static void via_pci_teardown_mmio(struct viafb_dev *vdev)
 485 {
 486         iounmap(vdev->fbmem);
 487         iounmap(vdev->engine_mmio);
 488 }
 489
 490 /*
 491  * Create our subsidiary devices.
 492  */
 493 static struct viafb_subdev_info {
 494         char *name;
 495         struct platform_device *platdev;
 496 } viafb_subdevs[] = {
 497         {
 498                 .name = "viafb-gpio",
 499         },
 500         {
 501                 .name = "viafb-i2c",
 502         },
 503 #if IS_ENABLED(CONFIG_VIDEO_VIA_CAMERA)
 504         {
 505                 .name = "viafb-camera",
 506         },
 507 #endif
 508 };
 509 #define N_SUBDEVS ARRAY_SIZE(viafb_subdevs)
 510
 511 static int via_create_subdev(struct viafb_dev *vdev,
 512                              struct viafb_subdev_info *info)
 513 {
 514         int ret;
 515
 516         info->platdev = platform_device_alloc(info->name, -1);
 517         if (!info->platdev) {
 518                 dev_err(&vdev->pdev->dev, "Unable to allocate pdev %s\n",
 519                         info->name);
 520                 return -ENOMEM;
 521         }
 522         info->platdev->dev.parent = &vdev->pdev->dev;
 523         info->platdev->dev.platform_data = vdev;
 524         ret = platform_device_add(info->platdev);
 525         if (ret) {
 526                 dev_err(&vdev->pdev->dev, "Unable to add pdev %s\n",
 527                                 info->name);
 528                 platform_device_put(info->platdev);
 529                 info->platdev = NULL;
 530         }
 531         return ret;
 532 }
 533
 534 static int via_setup_subdevs(struct viafb_dev *vdev)
 535 {
 536         int i;
 537
 538         /*
 539          * Ignore return values.  Even if some of the devices
 540          * fail to be created, we'll still be able to use some
 541          * of the rest.
 542          */
 543         for (i = 0; i < N_SUBDEVS; i++)
 544                 via_create_subdev(vdev, viafb_subdevs + i);
 545         return 0;
 546 }
 547
 548 static void via_teardown_subdevs(void)
 549 {
 550         int i;
 551
 552         for (i = 0; i < N_SUBDEVS; i++)
 553                 if (viafb_subdevs[i].platdev) {
 554                         viafb_subdevs[i].platdev->dev.platform_data = NULL;
 555                         platform_device_unregister(viafb_subdevs[i].platdev);
 556                 }
 557 }
 558
 559 /*
 560  * Power management functions
 561  */
 562 static __maybe_unused LIST_HEAD(viafb_pm_hooks);
 563 static __maybe_unused DEFINE_MUTEX(viafb_pm_hooks_lock);
 564
 565 void viafb_pm_register(struct viafb_pm_hooks *hooks)
 566 {
 567         INIT_LIST_HEAD(&hooks->list);
 568
 569         mutex_lock(&viafb_pm_hooks_lock);
 570         list_add_tail(&hooks->list, &viafb_pm_hooks);
 571         mutex_unlock(&viafb_pm_hooks_lock);
 572 }
 573 EXPORT_SYMBOL_GPL(viafb_pm_register);
 574
 575 void viafb_pm_unregister(struct viafb_pm_hooks *hooks)
 576 {
 577         mutex_lock(&viafb_pm_hooks_lock);
 578         list_del(&hooks->list);
 579         mutex_unlock(&viafb_pm_hooks_lock);
 580 }
 581 EXPORT_SYMBOL_GPL(viafb_pm_unregister);
 582
 583 static int __maybe_unused via_suspend(struct device *dev)
 584 {
 585         struct viafb_pm_hooks *hooks;
 586
 587         /*
 588          * "I've occasionally hit a few drivers that caused suspend
 589          * failures, and each and every time it was a driver bug, and
 590          * the right thing to do was to just ignore the error and suspend
 591          * anyway - returning an error code and trying to undo the suspend
 592          * is not what anybody ever really wants, even if our model
 593          *_allows_ for it."
 594          * -- Linus Torvalds, Dec. 7, 2009
 595          */
 596         mutex_lock(&viafb_pm_hooks_lock);
 597         list_for_each_entry_reverse(hooks, &viafb_pm_hooks, list)
 598                 hooks->suspend(hooks->private);
 599         mutex_unlock(&viafb_pm_hooks_lock);
 600
 601         return 0;
 602 }
 603
 604 static int __maybe_unused via_resume(struct device *dev)
 605 {
 606         struct viafb_pm_hooks *hooks;
 607
 608         /* Now bring back any subdevs */
 609         mutex_lock(&viafb_pm_hooks_lock);
 610         list_for_each_entry(hooks, &viafb_pm_hooks, list)
 611                 hooks->resume(hooks->private);
 612         mutex_unlock(&viafb_pm_hooks_lock);
 613
 614         return 0;
 615 }
 616
 617 static int via_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 618 {
 619         int ret;
 620
 621         ret = aperture_remove_conflicting_pci_devices(pdev, "viafb");
 622         if (ret)
 623                 return ret;
 624
 625         ret = pci_enable_device(pdev);
 626         if (ret)
 627                 return ret;
 628
 629         /*
 630          * Global device initialization.
 631          */
 632         memset(&global_dev, 0, sizeof(global_dev));
 633         global_dev.pdev = pdev;
 634         global_dev.chip_type = ent->driver_data;
 635         global_dev.port_cfg = adap_configs;
 636         if (machine_is_olpc())
 637                 global_dev.port_cfg = olpc_adap_configs;
 638
 639         spin_lock_init(&global_dev.reg_lock);
 640         ret = via_pci_setup_mmio(&global_dev);
 641         if (ret)
 642                 goto out_disable;
 643         /*
 644          * Set up interrupts and create our subdevices.  Continue even if
 645          * some things fail.
 646          */
 647         viafb_int_init();
 648         via_setup_subdevs(&global_dev);
 649         /*
 650          * Set up the framebuffer device
 651          */
 652         ret = via_fb_pci_probe(&global_dev);
 653         if (ret)
 654                 goto out_subdevs;
 655         return 0;
 656
 657 out_subdevs:
 658         via_teardown_subdevs();
 659         via_pci_teardown_mmio(&global_dev);
 660 out_disable:
 661         pci_disable_device(pdev);
 662         return ret;
 663 }
 664
 665 static void via_pci_remove(struct pci_dev *pdev)
 666 {
 667         via_teardown_subdevs();
 668         via_fb_pci_remove(pdev);
 669         via_pci_teardown_mmio(&global_dev);
 670         pci_disable_device(pdev);
 671 }
 672
 673
 674 static const struct pci_device_id via_pci_table[] = {
 675         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CLE266_DID),
 676           .driver_data = UNICHROME_CLE266 },
 677         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K400_DID),
 678           .driver_data = UNICHROME_K400 },
 679         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K800_DID),
 680           .driver_data = UNICHROME_K800 },
 681         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_PM800_DID),
 682           .driver_data = UNICHROME_PM800 },
 683         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CN700_DID),
 684           .driver_data = UNICHROME_CN700 },
 685         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CX700_DID),
 686           .driver_data = UNICHROME_CX700 },
 687         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CN750_DID),
 688           .driver_data = UNICHROME_CN750 },
 689         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K8M890_DID),
 690           .driver_data = UNICHROME_K8M890 },
 691         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_P4M890_DID),
 692           .driver_data = UNICHROME_P4M890 },
 693         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_P4M900_DID),
 694           .driver_data = UNICHROME_P4M900 },
 695         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX800_DID),
 696           .driver_data = UNICHROME_VX800 },
 697         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX855_DID),
 698           .driver_data = UNICHROME_VX855 },
 699         { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX900_DID),
 700           .driver_data = UNICHROME_VX900 },
 701         { }
 702 };
 703 MODULE_DEVICE_TABLE(pci, via_pci_table);
 704
 705 static const struct dev_pm_ops via_pm_ops = {
 706 #ifdef CONFIG_PM_SLEEP
 707         .suspend        = via_suspend,
 708         .resume         = via_resume,
 709         .freeze         = NULL,
 710         .thaw           = via_resume,
 711         .poweroff       = NULL,
 712         .restore        = via_resume,
 713 #endif
 714 };
 715
 716 static struct pci_driver via_driver = {
 717         .name           = "viafb",
 718         .id_table       = via_pci_table,
 719         .probe          = via_pci_probe,
 720         .remove         = via_pci_remove,
 721         .driver.pm      = &via_pm_ops,
 722 };
 723
 724 static int __init via_core_init(void)
 725 {
 726         int ret;
 727
 728         if (fb_modesetting_disabled("viafb"))
 729                 return -ENODEV;
 730
 731         ret = viafb_init();
 732         if (ret)
 733                 return ret;
 734         viafb_i2c_init();
 735         viafb_gpio_init();
 736         ret = pci_register_driver(&via_driver);
 737         if (ret) {
 738                 viafb_gpio_exit();
 739                 viafb_i2c_exit();
 740                 return ret;
 741         }
 742
 743         return 0;
 744 }
 745
 746 static void __exit via_core_exit(void)
 747 {
 748         pci_unregister_driver(&via_driver);
 749         viafb_gpio_exit();
 750         viafb_i2c_exit();
 751         viafb_exit();
 752 }
 753
 754 module_init(via_core_init);
 755 module_exit(via_core_exit);