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