drivers/macintosh/macio_asic.c

   1 /*
   2  * Bus & driver management routines for devices within
   3  * a MacIO ASIC. Interface to new driver model mostly
   4  * stolen from the PCI version.
   5  *
   6  *  Copyright (C) 2005 Ben. Herrenschmidt (benh@kernel.crashing.org)
   7  *
   8  *  This program is free software; you can redistribute it and/or
   9  *  modify it under the terms of the GNU General Public License
  10  *  as published by the Free Software Foundation; either version
  11  *  2 of the License, or (at your option) any later version.
  12  *
  13  * TODO:
  14  *
  15  *  - Don't probe below media bay by default, but instead provide
  16  *    some hooks for media bay to dynamically add/remove it's own
  17  *    sub-devices.
  18  */
  19
  20 #include <linux/string.h>
  21 #include <linux/kernel.h>
  22 #include <linux/pci.h>
  23 #include <linux/pci_ids.h>
  24 #include <linux/init.h>
  25 #include <linux/module.h>
  26 #include <linux/slab.h>
  27
  28 #include <asm/machdep.h>
  29 #include <asm/macio.h>
  30 #include <asm/pmac_feature.h>
  31 #include <asm/prom.h>
  32 #include <asm/pci-bridge.h>
  33
  34 #undef DEBUG
  35
  36 #define MAX_NODE_NAME_SIZE (20 - 12)
  37
  38 static struct macio_chip      *macio_on_hold;
  39
  40 static int macio_bus_match(struct device *dev, struct device_driver *drv)
  41 {
  42         struct macio_dev * macio_dev = to_macio_device(dev);
  43         struct macio_driver * macio_drv = to_macio_driver(drv);
  44         const struct of_device_id * matches = macio_drv->match_table;
  45
  46         if (!matches)
  47                 return 0;
  48
  49         return of_match_device(matches, &macio_dev->ofdev) != NULL;
  50 }
  51
  52 struct macio_dev *macio_dev_get(struct macio_dev *dev)
  53 {
  54         struct device *tmp;
  55
  56         if (!dev)
  57                 return NULL;
  58         tmp = get_device(&dev->ofdev.dev);
  59         if (tmp)
  60                 return to_macio_device(tmp);
  61         else
  62                 return NULL;
  63 }
  64
  65 void macio_dev_put(struct macio_dev *dev)
  66 {
  67         if (dev)
  68                 put_device(&dev->ofdev.dev);
  69 }
  70
  71
  72 static int macio_device_probe(struct device *dev)
  73 {
  74         int error = -ENODEV;
  75         struct macio_driver *drv;
  76         struct macio_dev *macio_dev;
  77         const struct of_device_id *match;
  78
  79         drv = to_macio_driver(dev->driver);
  80         macio_dev = to_macio_device(dev);
  81
  82         if (!drv->probe)
  83                 return error;
  84
  85         macio_dev_get(macio_dev);
  86
  87         match = of_match_device(drv->match_table, &macio_dev->ofdev);
  88         if (match)
  89                 error = drv->probe(macio_dev, match);
  90         if (error)
  91                 macio_dev_put(macio_dev);
  92
  93         return error;
  94 }
  95
  96 static int macio_device_remove(struct device *dev)
  97 {
  98         struct macio_dev * macio_dev = to_macio_device(dev);
  99         struct macio_driver * drv = to_macio_driver(dev->driver);
 100
 101         if (dev->driver && drv->remove)
 102                 drv->remove(macio_dev);
 103         macio_dev_put(macio_dev);
 104
 105         return 0;
 106 }
 107
 108 static void macio_device_shutdown(struct device *dev)
 109 {
 110         struct macio_dev * macio_dev = to_macio_device(dev);
 111         struct macio_driver * drv = to_macio_driver(dev->driver);
 112
 113         if (dev->driver && drv->shutdown)
 114                 drv->shutdown(macio_dev);
 115 }
 116
 117 static int macio_device_suspend(struct device *dev, pm_message_t state)
 118 {
 119         struct macio_dev * macio_dev = to_macio_device(dev);
 120         struct macio_driver * drv = to_macio_driver(dev->driver);
 121
 122         if (dev->driver && drv->suspend)
 123                 return drv->suspend(macio_dev, state);
 124         return 0;
 125 }
 126
 127 static int macio_device_resume(struct device * dev)
 128 {
 129         struct macio_dev * macio_dev = to_macio_device(dev);
 130         struct macio_driver * drv = to_macio_driver(dev->driver);
 131
 132         if (dev->driver && drv->resume)
 133                 return drv->resume(macio_dev);
 134         return 0;
 135 }
 136
 137 extern struct device_attribute macio_dev_attrs[];
 138
 139 struct bus_type macio_bus_type = {
 140        .name    = "macio",
 141        .match   = macio_bus_match,
 142        .uevent = of_device_uevent,
 143        .probe   = macio_device_probe,
 144        .remove  = macio_device_remove,
 145        .shutdown = macio_device_shutdown,
 146        .suspend = macio_device_suspend,
 147        .resume  = macio_device_resume,
 148        .dev_attrs = macio_dev_attrs,
 149 };
 150
 151 static int __init macio_bus_driver_init(void)
 152 {
 153         return bus_register(&macio_bus_type);
 154 }
 155
 156 postcore_initcall(macio_bus_driver_init);
 157
 158
 159 /**
 160  * macio_release_dev - free a macio device structure when all users of it are
 161  * finished.
 162  * @dev: device that's been disconnected
 163  *
 164  * Will be called only by the device core when all users of this macio device
 165  * are done. This currently means never as we don't hot remove any macio
 166  * device yet, though that will happen with mediabay based devices in a later
 167  * implementation.
 168  */
 169 static void macio_release_dev(struct device *dev)
 170 {
 171         struct macio_dev *mdev;
 172
 173         mdev = to_macio_device(dev);
 174         kfree(mdev);
 175 }
 176
 177 /**
 178  * macio_resource_quirks - tweak or skip some resources for a device
 179  * @np: pointer to the device node
 180  * @res: resulting resource
 181  * @index: index of resource in node
 182  *
 183  * If this routine returns non-null, then the resource is completely
 184  * skipped.
 185  */
 186 static int macio_resource_quirks(struct device_node *np, struct resource *res,
 187                                  int index)
 188 {
 189         /* Only quirks for memory resources for now */
 190         if ((res->flags & IORESOURCE_MEM) == 0)
 191                 return 0;
 192
 193         /* Grand Central has too large resource 0 on some machines */
 194         if (index == 0 && !strcmp(np->name, "gc"))
 195                 res->end = res->start + 0x1ffff;
 196
 197         /* Airport has bogus resource 2 */
 198         if (index >= 2 && !strcmp(np->name, "radio"))
 199                 return 1;
 200
 201 #ifndef CONFIG_PPC64
 202         /* DBDMAs may have bogus sizes */
 203         if ((res->start & 0x0001f000) == 0x00008000)
 204                 res->end = res->start + 0xff;
 205 #endif /* CONFIG_PPC64 */
 206
 207         /* ESCC parent eats child resources. We could have added a
 208          * level of hierarchy, but I don't really feel the need
 209          * for it
 210          */
 211         if (!strcmp(np->name, "escc"))
 212                 return 1;
 213
 214         /* ESCC has bogus resources >= 3 */
 215         if (index >= 3 && !(strcmp(np->name, "ch-a") &&
 216                             strcmp(np->name, "ch-b")))
 217                 return 1;
 218
 219         /* Media bay has too many resources, keep only first one */
 220         if (index > 0 && !strcmp(np->name, "media-bay"))
 221                 return 1;
 222
 223         /* Some older IDE resources have bogus sizes */
 224         if (!(strcmp(np->name, "IDE") && strcmp(np->name, "ATA") &&
 225               strcmp(np->type, "ide") && strcmp(np->type, "ata"))) {
 226                 if (index == 0 && (res->end - res->start) > 0xfff)
 227                         res->end = res->start + 0xfff;
 228                 if (index == 1 && (res->end - res->start) > 0xff)
 229                         res->end = res->start + 0xff;
 230         }
 231         return 0;
 232 }
 233
 234 static void macio_create_fixup_irq(struct macio_dev *dev, int index,
 235                                    unsigned int line)
 236 {
 237         unsigned int irq;
 238
 239         irq = irq_create_mapping(NULL, line);
 240         if (irq != NO_IRQ) {
 241                 dev->interrupt[index].start = irq;
 242                 dev->interrupt[index].flags = IORESOURCE_IRQ;
 243                 dev->interrupt[index].name = dev_name(&dev->ofdev.dev);
 244         }
 245         if (dev->n_interrupts <= index)
 246                 dev->n_interrupts = index + 1;
 247 }
 248
 249 static void macio_add_missing_resources(struct macio_dev *dev)
 250 {
 251         struct device_node *np = dev->ofdev.node;
 252         unsigned int irq_base;
 253
 254         /* Gatwick has some missing interrupts on child nodes */
 255         if (dev->bus->chip->type != macio_gatwick)
 256                 return;
 257
 258         /* irq_base is always 64 on gatwick. I have no cleaner way to get
 259          * that value from here at this point
 260          */
 261         irq_base = 64;
 262
 263         /* Fix SCC */
 264         if (strcmp(np->name, "ch-a") == 0) {
 265                 macio_create_fixup_irq(dev, 0, 15 + irq_base);
 266                 macio_create_fixup_irq(dev, 1,  4 + irq_base);
 267                 macio_create_fixup_irq(dev, 2,  5 + irq_base);
 268                 printk(KERN_INFO "macio: fixed SCC irqs on gatwick\n");
 269         }
 270
 271         /* Fix media-bay */
 272         if (strcmp(np->name, "media-bay") == 0) {
 273                 macio_create_fixup_irq(dev, 0, 29 + irq_base);
 274                 printk(KERN_INFO "macio: fixed media-bay irq on gatwick\n");
 275         }
 276
 277         /* Fix left media bay childs */
 278         if (dev->media_bay != NULL && strcmp(np->name, "floppy") == 0) {
 279                 macio_create_fixup_irq(dev, 0, 19 + irq_base);
 280                 macio_create_fixup_irq(dev, 1,  1 + irq_base);
 281                 printk(KERN_INFO "macio: fixed left floppy irqs\n");
 282         }
 283         if (dev->media_bay != NULL && strcasecmp(np->name, "ata4") == 0) {
 284                 macio_create_fixup_irq(dev, 0, 14 + irq_base);
 285                 macio_create_fixup_irq(dev, 0,  3 + irq_base);
 286                 printk(KERN_INFO "macio: fixed left ide irqs\n");
 287         }
 288 }
 289
 290 static void macio_setup_interrupts(struct macio_dev *dev)
 291 {
 292         struct device_node *np = dev->ofdev.node;
 293         unsigned int irq;
 294         int i = 0, j = 0;
 295
 296         for (;;) {
 297                 struct resource *res = &dev->interrupt[j];
 298
 299                 if (j >= MACIO_DEV_COUNT_IRQS)
 300                         break;
 301                 irq = irq_of_parse_and_map(np, i++);
 302                 if (irq == NO_IRQ)
 303                         break;
 304                 res->start = irq;
 305                 res->flags = IORESOURCE_IRQ;
 306                 res->name = dev_name(&dev->ofdev.dev);
 307                 if (macio_resource_quirks(np, res, i - 1)) {
 308                         memset(res, 0, sizeof(struct resource));
 309                         continue;
 310                 } else
 311                         j++;
 312         }
 313         dev->n_interrupts = j;
 314 }
 315
 316 static void macio_setup_resources(struct macio_dev *dev,
 317                                   struct resource *parent_res)
 318 {
 319         struct device_node *np = dev->ofdev.node;
 320         struct resource r;
 321         int index;
 322
 323         for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {
 324                 struct resource *res = &dev->resource[index];
 325                 if (index >= MACIO_DEV_COUNT_RESOURCES)
 326                         break;
 327                 *res = r;
 328                 res->name = dev_name(&dev->ofdev.dev);
 329
 330                 if (macio_resource_quirks(np, res, index)) {
 331                         memset(res, 0, sizeof(struct resource));
 332                         continue;
 333                 }
 334                 /* Currently, we consider failure as harmless, this may
 335                  * change in the future, once I've found all the device
 336                  * tree bugs in older machines & worked around them
 337                  */
 338                 if (insert_resource(parent_res, res)) {
 339                         printk(KERN_WARNING "Can't request resource "
 340                                "%d for MacIO device %s\n",
 341                                index, dev_name(&dev->ofdev.dev));
 342                 }
 343         }
 344         dev->n_resources = index;
 345 }
 346
 347 /**
 348  * macio_add_one_device - Add one device from OF node to the device tree
 349  * @chip: pointer to the macio_chip holding the device
 350  * @np: pointer to the device node in the OF tree
 351  * @in_bay: set to 1 if device is part of a media-bay
 352  *
 353  * When media-bay is changed to hotswap drivers, this function will
 354  * be exposed to the bay driver some way...
 355  */
 356 static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
 357                                                struct device *parent,
 358                                                struct device_node *np,
 359                                                struct macio_dev *in_bay,
 360                                                struct resource *parent_res)
 361 {
 362         struct macio_dev *dev;
 363         const u32 *reg;
 364
 365         if (np == NULL)
 366                 return NULL;
 367
 368         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 369         if (!dev)
 370                 return NULL;
 371
 372         dev->bus = &chip->lbus;
 373         dev->media_bay = in_bay;
 374         dev->ofdev.node = np;
 375         dev->ofdev.dma_mask = 0xffffffffUL;
 376         dev->ofdev.dev.dma_mask = &dev->ofdev.dma_mask;
 377         dev->ofdev.dev.parent = parent;
 378         dev->ofdev.dev.bus = &macio_bus_type;
 379         dev->ofdev.dev.release = macio_release_dev;
 380
 381 #ifdef CONFIG_PCI
 382         /* Set the DMA ops to the ones from the PCI device, this could be
 383          * fishy if we didn't know that on PowerMac it's always direct ops
 384          * or iommu ops that will work fine
 385          */
 386         dev->ofdev.dev.archdata.dma_ops =
 387                 chip->lbus.pdev->dev.archdata.dma_ops;
 388         dev->ofdev.dev.archdata.dma_data =
 389                 chip->lbus.pdev->dev.archdata.dma_data;
 390 #endif /* CONFIG_PCI */
 391
 392 #ifdef DEBUG
 393         printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
 394                dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
 395 #endif
 396
 397         /* MacIO itself has a different reg, we use it's PCI base */
 398         if (np == chip->of_node) {
 399                 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
 400                              chip->lbus.index,
 401 #ifdef CONFIG_PCI
 402                         (unsigned int)pci_resource_start(chip->lbus.pdev, 0),
 403 #else
 404                         0, /* NuBus may want to do something better here */
 405 #endif
 406                         MAX_NODE_NAME_SIZE, np->name);
 407         } else {
 408                 reg = of_get_property(np, "reg", NULL);
 409                 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
 410                              chip->lbus.index,
 411                              reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name);
 412         }
 413
 414         /* Setup interrupts & resources */
 415         macio_setup_interrupts(dev);
 416         macio_setup_resources(dev, parent_res);
 417         macio_add_missing_resources(dev);
 418
 419         /* Register with core */
 420         if (of_device_register(&dev->ofdev) != 0) {
 421                 printk(KERN_DEBUG"macio: device registration error for %s!\n",
 422                        dev_name(&dev->ofdev.dev));
 423                 kfree(dev);
 424                 return NULL;
 425         }
 426
 427         return dev;
 428 }
 429
 430 static int macio_skip_device(struct device_node *np)
 431 {
 432         if (strncmp(np->name, "battery", 7) == 0)
 433                 return 1;
 434         if (strncmp(np->name, "escc-legacy", 11) == 0)
 435                 return 1;
 436         return 0;
 437 }
 438
 439 /**
 440  * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
 441  * @chip: pointer to the macio_chip holding the devices
 442  *
 443  * This function will do the job of extracting devices from the
 444  * Open Firmware device tree, build macio_dev structures and add
 445  * them to the Linux device tree.
 446  *
 447  * For now, childs of media-bay are added now as well. This will
 448  * change rsn though.
 449  */
 450 static void macio_pci_add_devices(struct macio_chip *chip)
 451 {
 452         struct device_node *np, *pnode;
 453         struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
 454         struct device *parent = NULL;
 455         struct resource *root_res = &iomem_resource;
 456
 457         /* Add a node for the macio bus itself */
 458 #ifdef CONFIG_PCI
 459         if (chip->lbus.pdev) {
 460                 parent = &chip->lbus.pdev->dev;
 461                 root_res = &chip->lbus.pdev->resource[0];
 462         }
 463 #endif
 464         pnode = of_node_get(chip->of_node);
 465         if (pnode == NULL)
 466                 return;
 467
 468         /* Add macio itself to hierarchy */
 469         rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
 470         if (rdev == NULL)
 471                 return;
 472         root_res = &rdev->resource[0];
 473
 474         /* First scan 1st level */
 475         for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
 476                 if (macio_skip_device(np))
 477                         continue;
 478                 of_node_get(np);
 479                 mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
 480                                             root_res);
 481                 if (mdev == NULL)
 482                         of_node_put(np);
 483                 else if (strncmp(np->name, "media-bay", 9) == 0)
 484                         mbdev = mdev;
 485                 else if (strncmp(np->name, "escc", 4) == 0)
 486                         sdev = mdev;
 487         }
 488
 489         /* Add media bay devices if any */
 490         if (mbdev)
 491                 for (np = NULL; (np = of_get_next_child(mbdev->ofdev.node, np))
 492                              != NULL;) {
 493                         if (macio_skip_device(np))
 494                                 continue;
 495                         of_node_get(np);
 496                         if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
 497                                                  mbdev,  root_res) == NULL)
 498                                 of_node_put(np);
 499                 }
 500
 501         /* Add serial ports if any */
 502         if (sdev) {
 503                 for (np = NULL; (np = of_get_next_child(sdev->ofdev.node, np))
 504                              != NULL;) {
 505                         if (macio_skip_device(np))
 506                                 continue;
 507                         of_node_get(np);
 508                         if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
 509                                                  NULL, root_res) == NULL)
 510                                 of_node_put(np);
 511                 }
 512         }
 513 }
 514
 515
 516 /**
 517  * macio_register_driver - Registers a new MacIO device driver
 518  * @drv: pointer to the driver definition structure
 519  */
 520 int macio_register_driver(struct macio_driver *drv)
 521 {
 522         /* initialize common driver fields */
 523         drv->driver.name = drv->name;
 524         drv->driver.bus = &macio_bus_type;
 525
 526         /* register with core */
 527         return driver_register(&drv->driver);
 528 }
 529
 530 /**
 531  * macio_unregister_driver - Unregisters a new MacIO device driver
 532  * @drv: pointer to the driver definition structure
 533  */
 534 void macio_unregister_driver(struct macio_driver *drv)
 535 {
 536         driver_unregister(&drv->driver);
 537 }
 538
 539 /**
 540  *      macio_request_resource - Request an MMIO resource
 541  *      @dev: pointer to the device holding the resource
 542  *      @resource_no: resource number to request
 543  *      @name: resource name
 544  *
 545  *      Mark  memory region number @resource_no associated with MacIO
 546  *      device @dev as being reserved by owner @name.  Do not access
 547  *      any address inside the memory regions unless this call returns
 548  *      successfully.
 549  *
 550  *      Returns 0 on success, or %EBUSY on error.  A warning
 551  *      message is also printed on failure.
 552  */
 553 int macio_request_resource(struct macio_dev *dev, int resource_no,
 554                            const char *name)
 555 {
 556         if (macio_resource_len(dev, resource_no) == 0)
 557                 return 0;
 558
 559         if (!request_mem_region(macio_resource_start(dev, resource_no),
 560                                 macio_resource_len(dev, resource_no),
 561                                 name))
 562                 goto err_out;
 563
 564         return 0;
 565
 566 err_out:
 567         printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
 568                 " for device %s\n",
 569                 resource_no,
 570                 macio_resource_len(dev, resource_no),
 571                 macio_resource_start(dev, resource_no),
 572                 dev_name(&dev->ofdev.dev));
 573         return -EBUSY;
 574 }
 575
 576 /**
 577  * macio_release_resource - Release an MMIO resource
 578  * @dev: pointer to the device holding the resource
 579  * @resource_no: resource number to release
 580  */
 581 void macio_release_resource(struct macio_dev *dev, int resource_no)
 582 {
 583         if (macio_resource_len(dev, resource_no) == 0)
 584                 return;
 585         release_mem_region(macio_resource_start(dev, resource_no),
 586                            macio_resource_len(dev, resource_no));
 587 }
 588
 589 /**
 590  *      macio_request_resources - Reserve all memory resources
 591  *      @dev: MacIO device whose resources are to be reserved
 592  *      @name: Name to be associated with resource.
 593  *
 594  *      Mark all memory regions associated with MacIO device @dev as
 595  *      being reserved by owner @name.  Do not access any address inside
 596  *      the memory regions unless this call returns successfully.
 597  *
 598  *      Returns 0 on success, or %EBUSY on error.  A warning
 599  *      message is also printed on failure.
 600  */
 601 int macio_request_resources(struct macio_dev *dev, const char *name)
 602 {
 603         int i;
 604
 605         for (i = 0; i < dev->n_resources; i++)
 606                 if (macio_request_resource(dev, i, name))
 607                         goto err_out;
 608         return 0;
 609
 610 err_out:
 611         while(--i >= 0)
 612                 macio_release_resource(dev, i);
 613
 614         return -EBUSY;
 615 }
 616
 617 /**
 618  *      macio_release_resources - Release reserved memory resources
 619  *      @dev: MacIO device whose resources were previously reserved
 620  */
 621
 622 void macio_release_resources(struct macio_dev *dev)
 623 {
 624         int i;
 625
 626         for (i = 0; i < dev->n_resources; i++)
 627                 macio_release_resource(dev, i);
 628 }
 629
 630
 631 #ifdef CONFIG_PCI
 632
 633 static int __devinit macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 634 {
 635         struct device_node* np;
 636         struct macio_chip* chip;
 637
 638         if (ent->vendor != PCI_VENDOR_ID_APPLE)
 639                 return -ENODEV;
 640
 641         /* Note regarding refcounting: We assume pci_device_to_OF_node() is
 642          * ported to new OF APIs and returns a node with refcount incremented.
 643          */
 644         np = pci_device_to_OF_node(pdev);
 645         if (np == NULL)
 646                 return -ENODEV;
 647
 648         /* The above assumption is wrong !!!
 649          * fix that here for now until I fix the arch code
 650          */
 651         of_node_get(np);
 652
 653         /* We also assume that pmac_feature will have done a get() on nodes
 654          * stored in the macio chips array
 655          */
 656         chip = macio_find(np, macio_unknown);
 657         of_node_put(np);
 658         if (chip == NULL)
 659                 return -ENODEV;
 660
 661         /* XXX Need locking ??? */
 662         if (chip->lbus.pdev == NULL) {
 663                 chip->lbus.pdev = pdev;
 664                 chip->lbus.chip = chip;
 665                 pci_set_drvdata(pdev, &chip->lbus);
 666                 pci_set_master(pdev);
 667         }
 668
 669         printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
 670                 chip->name);
 671
 672         /*
 673          * HACK ALERT: The WallStreet PowerBook and some OHare based machines
 674          * have 2 macio ASICs. I must probe the "main" one first or IDE
 675          * ordering will be incorrect. So I put on "hold" the second one since
 676          * it seem to appear first on PCI
 677          */
 678         if (chip->type == macio_gatwick || chip->type == macio_ohareII)
 679                 if (macio_chips[0].lbus.pdev == NULL) {
 680                         macio_on_hold = chip;
 681                         return 0;
 682                 }
 683
 684         macio_pci_add_devices(chip);
 685         if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
 686                 macio_pci_add_devices(macio_on_hold);
 687                 macio_on_hold = NULL;
 688         }
 689
 690         return 0;
 691 }
 692
 693 static void __devexit macio_pci_remove(struct pci_dev* pdev)
 694 {
 695         panic("removing of macio-asic not supported !\n");
 696 }
 697
 698 /*
 699  * MacIO is matched against any Apple ID, it's probe() function
 700  * will then decide wether it applies or not
 701  */
 702 static const struct pci_device_id __devinitdata pci_ids [] = { {
 703         .vendor         = PCI_VENDOR_ID_APPLE,
 704         .device         = PCI_ANY_ID,
 705         .subvendor      = PCI_ANY_ID,
 706         .subdevice      = PCI_ANY_ID,
 707
 708         }, { /* end: all zeroes */ }
 709 };
 710 MODULE_DEVICE_TABLE (pci, pci_ids);
 711
 712 /* pci driver glue; this is a "new style" PCI driver module */
 713 static struct pci_driver macio_pci_driver = {
 714         .name           = (char *) "macio",
 715         .id_table       = pci_ids,
 716
 717         .probe          = macio_pci_probe,
 718         .remove         = macio_pci_remove,
 719 };
 720
 721 #endif /* CONFIG_PCI */
 722
 723 static int __init macio_module_init (void)
 724 {
 725 #ifdef CONFIG_PCI
 726         int rc;
 727
 728         rc = pci_register_driver(&macio_pci_driver);
 729         if (rc)
 730                 return rc;
 731 #endif /* CONFIG_PCI */
 732         return 0;
 733 }
 734
 735 module_init(macio_module_init);
 736
 737 EXPORT_SYMBOL(macio_register_driver);
 738 EXPORT_SYMBOL(macio_unregister_driver);
 739 EXPORT_SYMBOL(macio_dev_get);
 740 EXPORT_SYMBOL(macio_dev_put);
 741 EXPORT_SYMBOL(macio_request_resource);
 742 EXPORT_SYMBOL(macio_release_resource);
 743 EXPORT_SYMBOL(macio_request_resources);
 744 EXPORT_SYMBOL(macio_release_resources);