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/config.h>
  21 #include <linux/string.h>
  22 #include <linux/kernel.h>
  23 #include <linux/pci.h>
  24 #include <linux/pci_ids.h>
  25 #include <linux/init.h>
  26 #include <linux/module.h>
  27 #include <linux/slab.h>
  28
  29 #include <asm/machdep.h>
  30 #include <asm/macio.h>
  31 #include <asm/pmac_feature.h>
  32 #include <asm/prom.h>
  33 #include <asm/pci-bridge.h>
  34
  35 #undef DEBUG
  36
  37 #define MAX_NODE_NAME_SIZE (BUS_ID_SIZE - 12)
  38
  39 static struct macio_chip      *macio_on_hold;
  40
  41 static int macio_bus_match(struct device *dev, struct device_driver *drv)
  42 {
  43         struct macio_dev * macio_dev = to_macio_device(dev);
  44         struct macio_driver * macio_drv = to_macio_driver(drv);
  45         const struct of_device_id * matches = macio_drv->match_table;
  46
  47         if (!matches)
  48                 return 0;
  49
  50         return of_match_device(matches, &macio_dev->ofdev) != NULL;
  51 }
  52
  53 struct macio_dev *macio_dev_get(struct macio_dev *dev)
  54 {
  55         struct device *tmp;
  56
  57         if (!dev)
  58                 return NULL;
  59         tmp = get_device(&dev->ofdev.dev);
  60         if (tmp)
  61                 return to_macio_device(tmp);
  62         else
  63                 return NULL;
  64 }
  65
  66 void macio_dev_put(struct macio_dev *dev)
  67 {
  68         if (dev)
  69                 put_device(&dev->ofdev.dev);
  70 }
  71
  72
  73 static int macio_device_probe(struct device *dev)
  74 {
  75         int error = -ENODEV;
  76         struct macio_driver *drv;
  77         struct macio_dev *macio_dev;
  78         const struct of_device_id *match;
  79
  80         drv = to_macio_driver(dev->driver);
  81         macio_dev = to_macio_device(dev);
  82
  83         if (!drv->probe)
  84                 return error;
  85
  86         macio_dev_get(macio_dev);
  87
  88         match = of_match_device(drv->match_table, &macio_dev->ofdev);
  89         if (match)
  90                 error = drv->probe(macio_dev, match);
  91         if (error)
  92                 macio_dev_put(macio_dev);
  93
  94         return error;
  95 }
  96
  97 static int macio_device_remove(struct device *dev)
  98 {
  99         struct macio_dev * macio_dev = to_macio_device(dev);
 100         struct macio_driver * drv = to_macio_driver(dev->driver);
 101
 102         if (dev->driver && drv->remove)
 103                 drv->remove(macio_dev);
 104         macio_dev_put(macio_dev);
 105
 106         return 0;
 107 }
 108
 109 static void macio_device_shutdown(struct device *dev)
 110 {
 111         struct macio_dev * macio_dev = to_macio_device(dev);
 112         struct macio_driver * drv = to_macio_driver(dev->driver);
 113
 114         if (dev->driver && drv->shutdown)
 115                 drv->shutdown(macio_dev);
 116 }
 117
 118 static int macio_device_suspend(struct device *dev, pm_message_t state)
 119 {
 120         struct macio_dev * macio_dev = to_macio_device(dev);
 121         struct macio_driver * drv = to_macio_driver(dev->driver);
 122
 123         if (dev->driver && drv->suspend)
 124                 return drv->suspend(macio_dev, state);
 125         return 0;
 126 }
 127
 128 static int macio_device_resume(struct device * dev)
 129 {
 130         struct macio_dev * macio_dev = to_macio_device(dev);
 131         struct macio_driver * drv = to_macio_driver(dev->driver);
 132
 133         if (dev->driver && drv->resume)
 134                 return drv->resume(macio_dev);
 135         return 0;
 136 }
 137
 138 static int macio_uevent(struct device *dev, char **envp, int num_envp,
 139                           char *buffer, int buffer_size)
 140 {
 141         struct macio_dev * macio_dev;
 142         struct of_device * of;
 143         char *scratch, *compat, *compat2;
 144         int i = 0;
 145         int length, cplen, cplen2, seen = 0;
 146
 147         if (!dev)
 148                 return -ENODEV;
 149
 150         macio_dev = to_macio_device(dev);
 151         if (!macio_dev)
 152                 return -ENODEV;
 153
 154         of = &macio_dev->ofdev;
 155
 156         /* stuff we want to pass to /sbin/hotplug */
 157         envp[i++] = scratch = buffer;
 158         length = scnprintf (scratch, buffer_size, "OF_NAME=%s", of->node->name);
 159         ++length;
 160         buffer_size -= length;
 161         if ((buffer_size <= 0) || (i >= num_envp))
 162                 return -ENOMEM;
 163         scratch += length;
 164
 165         envp[i++] = scratch;
 166         length = scnprintf (scratch, buffer_size, "OF_TYPE=%s", of->node->type);
 167         ++length;
 168         buffer_size -= length;
 169         if ((buffer_size <= 0) || (i >= num_envp))
 170                 return -ENOMEM;
 171         scratch += length;
 172
 173         /* Since the compatible field can contain pretty much anything
 174          * it's not really legal to split it out with commas. We split it
 175          * up using a number of environment variables instead. */
 176
 177         compat = (char *) get_property(of->node, "compatible", &cplen);
 178         compat2 = compat;
 179         cplen2= cplen;
 180         while (compat && cplen > 0) {
 181                 envp[i++] = scratch;
 182                 length = scnprintf (scratch, buffer_size,
 183                                      "OF_COMPATIBLE_%d=%s", seen, compat);
 184                 ++length;
 185                 buffer_size -= length;
 186                 if ((buffer_size <= 0) || (i >= num_envp))
 187                         return -ENOMEM;
 188                 scratch += length;
 189                 length = strlen (compat) + 1;
 190                 compat += length;
 191                 cplen -= length;
 192                 seen++;
 193         }
 194
 195         envp[i++] = scratch;
 196         length = scnprintf (scratch, buffer_size, "OF_COMPATIBLE_N=%d", seen);
 197         ++length;
 198         buffer_size -= length;
 199         if ((buffer_size <= 0) || (i >= num_envp))
 200                 return -ENOMEM;
 201         scratch += length;
 202
 203         envp[i++] = scratch;
 204         length = scnprintf (scratch, buffer_size, "MODALIAS=of:N%sT%s",
 205                         of->node->name, of->node->type);
 206         /* overwrite '\0' */
 207         buffer_size -= length;
 208         if ((buffer_size <= 0) || (i >= num_envp))
 209                 return -ENOMEM;
 210         scratch += length;
 211
 212         if (!compat2) {
 213                 compat2 = "";
 214                 cplen2 = 1;
 215         }
 216         while (cplen2 > 0) {
 217                 length = snprintf (scratch, buffer_size, "C%s", compat2);
 218                 buffer_size -= length;
 219                 if (buffer_size <= 0)
 220                         return -ENOMEM;
 221                 scratch += length;
 222                 length = strlen (compat2) + 1;
 223                 compat2 += length;
 224                 cplen2 -= length;
 225         }
 226
 227         envp[i] = NULL;
 228
 229         return 0;
 230 }
 231
 232 extern struct device_attribute macio_dev_attrs[];
 233
 234 struct bus_type macio_bus_type = {
 235        .name    = "macio",
 236        .match   = macio_bus_match,
 237        .uevent = macio_uevent,
 238        .probe   = macio_device_probe,
 239        .remove  = macio_device_remove,
 240        .shutdown = macio_device_shutdown,
 241        .suspend = macio_device_suspend,
 242        .resume  = macio_device_resume,
 243        .dev_attrs = macio_dev_attrs,
 244 };
 245
 246 static int __init macio_bus_driver_init(void)
 247 {
 248         return bus_register(&macio_bus_type);
 249 }
 250
 251 postcore_initcall(macio_bus_driver_init);
 252
 253
 254 /**
 255  * macio_release_dev - free a macio device structure when all users of it are
 256  * finished.
 257  * @dev: device that's been disconnected
 258  *
 259  * Will be called only by the device core when all users of this macio device
 260  * are done. This currently means never as we don't hot remove any macio
 261  * device yet, though that will happen with mediabay based devices in a later
 262  * implementation.
 263  */
 264 static void macio_release_dev(struct device *dev)
 265 {
 266         struct macio_dev *mdev;
 267
 268         mdev = to_macio_device(dev);
 269         kfree(mdev);
 270 }
 271
 272 /**
 273  * macio_resource_quirks - tweak or skip some resources for a device
 274  * @np: pointer to the device node
 275  * @res: resulting resource
 276  * @index: index of resource in node
 277  *
 278  * If this routine returns non-null, then the resource is completely
 279  * skipped.
 280  */
 281 static int macio_resource_quirks(struct device_node *np, struct resource *res,
 282                                  int index)
 283 {
 284         if (res->flags & IORESOURCE_MEM) {
 285                 /* Grand Central has too large resource 0 on some machines */
 286                 if (index == 0 && !strcmp(np->name, "gc"))
 287                         res->end = res->start + 0x1ffff;
 288
 289                 /* Airport has bogus resource 2 */
 290                 if (index >= 2 && !strcmp(np->name, "radio"))
 291                         return 1;
 292
 293 #ifndef CONFIG_PPC64
 294                 /* DBDMAs may have bogus sizes */
 295                 if ((res->start & 0x0001f000) == 0x00008000)
 296                         res->end = res->start + 0xff;
 297 #endif /* CONFIG_PPC64 */
 298
 299                 /* ESCC parent eats child resources. We could have added a
 300                  * level of hierarchy, but I don't really feel the need
 301                  * for it
 302                  */
 303                 if (!strcmp(np->name, "escc"))
 304                         return 1;
 305
 306                 /* ESCC has bogus resources >= 3 */
 307                 if (index >= 3 && !(strcmp(np->name, "ch-a") &&
 308                                     strcmp(np->name, "ch-b")))
 309                         return 1;
 310
 311                 /* Media bay has too many resources, keep only first one */
 312                 if (index > 0 && !strcmp(np->name, "media-bay"))
 313                         return 1;
 314
 315                 /* Some older IDE resources have bogus sizes */
 316                 if (!(strcmp(np->name, "IDE") && strcmp(np->name, "ATA") &&
 317                       strcmp(np->type, "ide") && strcmp(np->type, "ata"))) {
 318                         if (index == 0 && (res->end - res->start) > 0xfff)
 319                                 res->end = res->start + 0xfff;
 320                         if (index == 1 && (res->end - res->start) > 0xff)
 321                                 res->end = res->start + 0xff;
 322                 }
 323         }
 324         return 0;
 325 }
 326
 327
 328 static void macio_setup_interrupts(struct macio_dev *dev)
 329 {
 330         struct device_node *np = dev->ofdev.node;
 331         int i,j;
 332
 333         /* For now, we use pre-parsed entries in the device-tree for
 334          * interrupt routing and addresses, but we should change that
 335          * to dynamically parsed entries and so get rid of most of the
 336          * clutter in struct device_node
 337          */
 338         for (i = j = 0; i < np->n_intrs; i++) {
 339                 struct resource *res = &dev->interrupt[j];
 340
 341                 if (j >= MACIO_DEV_COUNT_IRQS)
 342                         break;
 343                 res->start = np->intrs[i].line;
 344                 res->flags = IORESOURCE_IO;
 345                 if (np->intrs[j].sense)
 346                         res->flags |= IORESOURCE_IRQ_LOWLEVEL;
 347                 else
 348                         res->flags |= IORESOURCE_IRQ_HIGHEDGE;
 349                 res->name = dev->ofdev.dev.bus_id;
 350                 if (macio_resource_quirks(np, res, i))
 351                         memset(res, 0, sizeof(struct resource));
 352                 else
 353                         j++;
 354         }
 355         dev->n_interrupts = j;
 356 }
 357
 358 static void macio_setup_resources(struct macio_dev *dev,
 359                                   struct resource *parent_res)
 360 {
 361         struct device_node *np = dev->ofdev.node;
 362         struct resource r;
 363         int index;
 364
 365         for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {
 366                 struct resource *res = &dev->resource[index];
 367                 if (index >= MACIO_DEV_COUNT_RESOURCES)
 368                         break;
 369                 *res = r;
 370                 res->name = dev->ofdev.dev.bus_id;
 371
 372                 if (macio_resource_quirks(np, res, index)) {
 373                         memset(res, 0, sizeof(struct resource));
 374                         continue;
 375                 }
 376                 /* Currently, we consider failure as harmless, this may
 377                  * change in the future, once I've found all the device
 378                  * tree bugs in older machines & worked around them
 379                  */
 380                 if (insert_resource(parent_res, res)) {
 381                         printk(KERN_WARNING "Can't request resource "
 382                                "%d for MacIO device %s\n",
 383                                index, dev->ofdev.dev.bus_id);
 384                 }
 385         }
 386         dev->n_resources = index;
 387 }
 388
 389 /**
 390  * macio_add_one_device - Add one device from OF node to the device tree
 391  * @chip: pointer to the macio_chip holding the device
 392  * @np: pointer to the device node in the OF tree
 393  * @in_bay: set to 1 if device is part of a media-bay
 394  *
 395  * When media-bay is changed to hotswap drivers, this function will
 396  * be exposed to the bay driver some way...
 397  */
 398 static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
 399                                                struct device *parent,
 400                                                struct device_node *np,
 401                                                struct macio_dev *in_bay,
 402                                                struct resource *parent_res)
 403 {
 404         struct macio_dev *dev;
 405         u32 *reg;
 406
 407         if (np == NULL)
 408                 return NULL;
 409
 410         dev = kmalloc(sizeof(*dev), GFP_KERNEL);
 411         if (!dev)
 412                 return NULL;
 413         memset(dev, 0, sizeof(*dev));
 414
 415         dev->bus = &chip->lbus;
 416         dev->media_bay = in_bay;
 417         dev->ofdev.node = np;
 418         dev->ofdev.dma_mask = 0xffffffffUL;
 419         dev->ofdev.dev.dma_mask = &dev->ofdev.dma_mask;
 420         dev->ofdev.dev.parent = parent;
 421         dev->ofdev.dev.bus = &macio_bus_type;
 422         dev->ofdev.dev.release = macio_release_dev;
 423
 424 #ifdef DEBUG
 425         printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
 426                dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
 427 #endif
 428
 429         /* MacIO itself has a different reg, we use it's PCI base */
 430         if (np == chip->of_node) {
 431                 sprintf(dev->ofdev.dev.bus_id, "%1d.%08lx:%.*s",
 432                         chip->lbus.index,
 433 #ifdef CONFIG_PCI
 434                         pci_resource_start(chip->lbus.pdev, 0),
 435 #else
 436                         0, /* NuBus may want to do something better here */
 437 #endif
 438                         MAX_NODE_NAME_SIZE, np->name);
 439         } else {
 440                 reg = (u32 *)get_property(np, "reg", NULL);
 441                 sprintf(dev->ofdev.dev.bus_id, "%1d.%08x:%.*s",
 442                         chip->lbus.index,
 443                         reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name);
 444         }
 445
 446         /* Setup interrupts & resources */
 447         macio_setup_interrupts(dev);
 448         macio_setup_resources(dev, parent_res);
 449
 450         /* Register with core */
 451         if (of_device_register(&dev->ofdev) != 0) {
 452                 printk(KERN_DEBUG"macio: device registration error for %s!\n",
 453                        dev->ofdev.dev.bus_id);
 454                 kfree(dev);
 455                 return NULL;
 456         }
 457
 458         return dev;
 459 }
 460
 461 static int macio_skip_device(struct device_node *np)
 462 {
 463         if (strncmp(np->name, "battery", 7) == 0)
 464                 return 1;
 465         if (strncmp(np->name, "escc-legacy", 11) == 0)
 466                 return 1;
 467         return 0;
 468 }
 469
 470 /**
 471  * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
 472  * @chip: pointer to the macio_chip holding the devices
 473  *
 474  * This function will do the job of extracting devices from the
 475  * Open Firmware device tree, build macio_dev structures and add
 476  * them to the Linux device tree.
 477  *
 478  * For now, childs of media-bay are added now as well. This will
 479  * change rsn though.
 480  */
 481 static void macio_pci_add_devices(struct macio_chip *chip)
 482 {
 483         struct device_node *np, *pnode;
 484         struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
 485         struct device *parent = NULL;
 486         struct resource *root_res = &iomem_resource;
 487
 488         /* Add a node for the macio bus itself */
 489 #ifdef CONFIG_PCI
 490         if (chip->lbus.pdev) {
 491                 parent = &chip->lbus.pdev->dev;
 492                 root_res = &chip->lbus.pdev->resource[0];
 493         }
 494 #endif
 495         pnode = of_node_get(chip->of_node);
 496         if (pnode == NULL)
 497                 return;
 498
 499         /* Add macio itself to hierarchy */
 500         rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
 501         if (rdev == NULL)
 502                 return;
 503         root_res = &rdev->resource[0];
 504
 505         /* First scan 1st level */
 506         for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
 507                 if (macio_skip_device(np))
 508                         continue;
 509                 of_node_get(np);
 510                 mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
 511                                             root_res);
 512                 if (mdev == NULL)
 513                         of_node_put(np);
 514                 else if (strncmp(np->name, "media-bay", 9) == 0)
 515                         mbdev = mdev;
 516                 else if (strncmp(np->name, "escc", 4) == 0)
 517                         sdev = mdev;
 518         }
 519
 520         /* Add media bay devices if any */
 521         if (mbdev)
 522                 for (np = NULL; (np = of_get_next_child(mbdev->ofdev.node, np))
 523                              != NULL;) {
 524                         if (macio_skip_device(np))
 525                                 continue;
 526                         of_node_get(np);
 527                         if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
 528                                                  mbdev,  root_res) == NULL)
 529                                 of_node_put(np);
 530                 }
 531
 532         /* Add serial ports if any */
 533         if (sdev) {
 534                 for (np = NULL; (np = of_get_next_child(sdev->ofdev.node, np))
 535                              != NULL;) {
 536                         if (macio_skip_device(np))
 537                                 continue;
 538                         of_node_get(np);
 539                         if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
 540                                                  NULL, root_res) == NULL)
 541                                 of_node_put(np);
 542                 }
 543         }
 544 }
 545
 546
 547 /**
 548  * macio_register_driver - Registers a new MacIO device driver
 549  * @drv: pointer to the driver definition structure
 550  */
 551 int macio_register_driver(struct macio_driver *drv)
 552 {
 553         /* initialize common driver fields */
 554         drv->driver.name = drv->name;
 555         drv->driver.bus = &macio_bus_type;
 556
 557         /* register with core */
 558         return driver_register(&drv->driver);
 559 }
 560
 561 /**
 562  * macio_unregister_driver - Unregisters a new MacIO device driver
 563  * @drv: pointer to the driver definition structure
 564  */
 565 void macio_unregister_driver(struct macio_driver *drv)
 566 {
 567         driver_unregister(&drv->driver);
 568 }
 569
 570 /**
 571  *      macio_request_resource - Request an MMIO resource
 572  *      @dev: pointer to the device holding the resource
 573  *      @resource_no: resource number to request
 574  *      @name: resource name
 575  *
 576  *      Mark  memory region number @resource_no associated with MacIO
 577  *      device @dev as being reserved by owner @name.  Do not access
 578  *      any address inside the memory regions unless this call returns
 579  *      successfully.
 580  *
 581  *      Returns 0 on success, or %EBUSY on error.  A warning
 582  *      message is also printed on failure.
 583  */
 584 int macio_request_resource(struct macio_dev *dev, int resource_no,
 585                            const char *name)
 586 {
 587         if (macio_resource_len(dev, resource_no) == 0)
 588                 return 0;
 589
 590         if (!request_mem_region(macio_resource_start(dev, resource_no),
 591                                 macio_resource_len(dev, resource_no),
 592                                 name))
 593                 goto err_out;
 594
 595         return 0;
 596
 597 err_out:
 598         printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
 599                 " for device %s\n",
 600                 resource_no,
 601                 macio_resource_len(dev, resource_no),
 602                 macio_resource_start(dev, resource_no),
 603                 dev->ofdev.dev.bus_id);
 604         return -EBUSY;
 605 }
 606
 607 /**
 608  * macio_release_resource - Release an MMIO resource
 609  * @dev: pointer to the device holding the resource
 610  * @resource_no: resource number to release
 611  */
 612 void macio_release_resource(struct macio_dev *dev, int resource_no)
 613 {
 614         if (macio_resource_len(dev, resource_no) == 0)
 615                 return;
 616         release_mem_region(macio_resource_start(dev, resource_no),
 617                            macio_resource_len(dev, resource_no));
 618 }
 619
 620 /**
 621  *      macio_request_resources - Reserve all memory resources
 622  *      @dev: MacIO device whose resources are to be reserved
 623  *      @name: Name to be associated with resource.
 624  *
 625  *      Mark all memory regions associated with MacIO device @dev as
 626  *      being reserved by owner @name.  Do not access any address inside
 627  *      the memory regions unless this call returns successfully.
 628  *
 629  *      Returns 0 on success, or %EBUSY on error.  A warning
 630  *      message is also printed on failure.
 631  */
 632 int macio_request_resources(struct macio_dev *dev, const char *name)
 633 {
 634         int i;
 635
 636         for (i = 0; i < dev->n_resources; i++)
 637                 if (macio_request_resource(dev, i, name))
 638                         goto err_out;
 639         return 0;
 640
 641 err_out:
 642         while(--i >= 0)
 643                 macio_release_resource(dev, i);
 644
 645         return -EBUSY;
 646 }
 647
 648 /**
 649  *      macio_release_resources - Release reserved memory resources
 650  *      @dev: MacIO device whose resources were previously reserved
 651  */
 652
 653 void macio_release_resources(struct macio_dev *dev)
 654 {
 655         int i;
 656
 657         for (i = 0; i < dev->n_resources; i++)
 658                 macio_release_resource(dev, i);
 659 }
 660
 661
 662 #ifdef CONFIG_PCI
 663
 664 static int __devinit macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 665 {
 666         struct device_node* np;
 667         struct macio_chip* chip;
 668
 669         if (ent->vendor != PCI_VENDOR_ID_APPLE)
 670                 return -ENODEV;
 671
 672         /* Note regarding refcounting: We assume pci_device_to_OF_node() is
 673          * ported to new OF APIs and returns a node with refcount incremented.
 674          */
 675         np = pci_device_to_OF_node(pdev);
 676         if (np == NULL)
 677                 return -ENODEV;
 678
 679         /* The above assumption is wrong !!!
 680          * fix that here for now until I fix the arch code
 681          */
 682         of_node_get(np);
 683
 684         /* We also assume that pmac_feature will have done a get() on nodes
 685          * stored in the macio chips array
 686          */
 687         chip = macio_find(np, macio_unknown);
 688         of_node_put(np);
 689         if (chip == NULL)
 690                 return -ENODEV;
 691
 692         /* XXX Need locking ??? */
 693         if (chip->lbus.pdev == NULL) {
 694                 chip->lbus.pdev = pdev;
 695                 chip->lbus.chip = chip;
 696                 pci_set_drvdata(pdev, &chip->lbus);
 697                 pci_set_master(pdev);
 698         }
 699
 700         printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
 701                 chip->name);
 702
 703         /*
 704          * HACK ALERT: The WallStreet PowerBook and some OHare based machines
 705          * have 2 macio ASICs. I must probe the "main" one first or IDE
 706          * ordering will be incorrect. So I put on "hold" the second one since
 707          * it seem to appear first on PCI
 708          */
 709         if (chip->type == macio_gatwick || chip->type == macio_ohareII)
 710                 if (macio_chips[0].lbus.pdev == NULL) {
 711                         macio_on_hold = chip;
 712                         return 0;
 713                 }
 714
 715         macio_pci_add_devices(chip);
 716         if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
 717                 macio_pci_add_devices(macio_on_hold);
 718                 macio_on_hold = NULL;
 719         }
 720
 721         return 0;
 722 }
 723
 724 static void __devexit macio_pci_remove(struct pci_dev* pdev)
 725 {
 726         panic("removing of macio-asic not supported !\n");
 727 }
 728
 729 /*
 730  * MacIO is matched against any Apple ID, it's probe() function
 731  * will then decide wether it applies or not
 732  */
 733 static const struct pci_device_id __devinitdata pci_ids [] = { {
 734         .vendor         = PCI_VENDOR_ID_APPLE,
 735         .device         = PCI_ANY_ID,
 736         .subvendor      = PCI_ANY_ID,
 737         .subdevice      = PCI_ANY_ID,
 738
 739         }, { /* end: all zeroes */ }
 740 };
 741 MODULE_DEVICE_TABLE (pci, pci_ids);
 742
 743 /* pci driver glue; this is a "new style" PCI driver module */
 744 static struct pci_driver macio_pci_driver = {
 745         .name           = (char *) "macio",
 746         .id_table       = pci_ids,
 747
 748         .probe          = macio_pci_probe,
 749         .remove         = macio_pci_remove,
 750 };
 751
 752 #endif /* CONFIG_PCI */
 753
 754 static int __init macio_module_init (void)
 755 {
 756 #ifdef CONFIG_PCI
 757         int rc;
 758
 759         rc = pci_register_driver(&macio_pci_driver);
 760         if (rc)
 761                 return rc;
 762 #endif /* CONFIG_PCI */
 763         return 0;
 764 }
 765
 766 module_init(macio_module_init);
 767
 768 EXPORT_SYMBOL(macio_register_driver);
 769 EXPORT_SYMBOL(macio_unregister_driver);
 770 EXPORT_SYMBOL(macio_dev_get);
 771 EXPORT_SYMBOL(macio_dev_put);
 772 EXPORT_SYMBOL(macio_request_resource);
 773 EXPORT_SYMBOL(macio_release_resource);
 774 EXPORT_SYMBOL(macio_request_resources);
 775 EXPORT_SYMBOL(macio_release_resources);