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         const struct of_device_id * matches = drv->of_match_table;
  43
  44         if (!matches)
  45                 return 0;
  46
  47         return of_match_device(matches, dev) != NULL;
  48 }
  49
  50 struct macio_dev *macio_dev_get(struct macio_dev *dev)
  51 {
  52         struct device *tmp;
  53
  54         if (!dev)
  55                 return NULL;
  56         tmp = get_device(&dev->ofdev.dev);
  57         if (tmp)
  58                 return to_macio_device(tmp);
  59         else
  60                 return NULL;
  61 }
  62
  63 void macio_dev_put(struct macio_dev *dev)
  64 {
  65         if (dev)
  66                 put_device(&dev->ofdev.dev);
  67 }
  68
  69
  70 static int macio_device_probe(struct device *dev)
  71 {
  72         int error = -ENODEV;
  73         struct macio_driver *drv;
  74         struct macio_dev *macio_dev;
  75         const struct of_device_id *match;
  76
  77         drv = to_macio_driver(dev->driver);
  78         macio_dev = to_macio_device(dev);
  79
  80         if (!drv->probe)
  81                 return error;
  82
  83         macio_dev_get(macio_dev);
  84
  85         match = of_match_device(drv->driver.of_match_table, dev);
  86         if (match)
  87                 error = drv->probe(macio_dev, match);
  88         if (error)
  89                 macio_dev_put(macio_dev);
  90
  91         return error;
  92 }
  93
  94 static int macio_device_remove(struct device *dev)
  95 {
  96         struct macio_dev * macio_dev = to_macio_device(dev);
  97         struct macio_driver * drv = to_macio_driver(dev->driver);
  98
  99         if (dev->driver && drv->remove)
 100                 drv->remove(macio_dev);
 101         macio_dev_put(macio_dev);
 102
 103         return 0;
 104 }
 105
 106 static void macio_device_shutdown(struct device *dev)
 107 {
 108         struct macio_dev * macio_dev = to_macio_device(dev);
 109         struct macio_driver * drv = to_macio_driver(dev->driver);
 110
 111         if (dev->driver && drv->shutdown)
 112                 drv->shutdown(macio_dev);
 113 }
 114
 115 static int macio_device_suspend(struct device *dev, pm_message_t state)
 116 {
 117         struct macio_dev * macio_dev = to_macio_device(dev);
 118         struct macio_driver * drv = to_macio_driver(dev->driver);
 119
 120         if (dev->driver && drv->suspend)
 121                 return drv->suspend(macio_dev, state);
 122         return 0;
 123 }
 124
 125 static int macio_device_resume(struct device * dev)
 126 {
 127         struct macio_dev * macio_dev = to_macio_device(dev);
 128         struct macio_driver * drv = to_macio_driver(dev->driver);
 129
 130         if (dev->driver && drv->resume)
 131                 return drv->resume(macio_dev);
 132         return 0;
 133 }
 134
 135 extern struct device_attribute macio_dev_attrs[];
 136
 137 struct bus_type macio_bus_type = {
 138        .name    = "macio",
 139        .match   = macio_bus_match,
 140        .uevent = of_device_uevent,
 141        .probe   = macio_device_probe,
 142        .remove  = macio_device_remove,
 143        .shutdown = macio_device_shutdown,
 144        .suspend = macio_device_suspend,
 145        .resume  = macio_device_resume,
 146        .dev_attrs = macio_dev_attrs,
 147 };
 148
 149 static int __init macio_bus_driver_init(void)
 150 {
 151         return bus_register(&macio_bus_type);
 152 }
 153
 154 postcore_initcall(macio_bus_driver_init);
 155
 156
 157 /**
 158  * macio_release_dev - free a macio device structure when all users of it are
 159  * finished.
 160  * @dev: device that's been disconnected
 161  *
 162  * Will be called only by the device core when all users of this macio device
 163  * are done. This currently means never as we don't hot remove any macio
 164  * device yet, though that will happen with mediabay based devices in a later
 165  * implementation.
 166  */
 167 static void macio_release_dev(struct device *dev)
 168 {
 169         struct macio_dev *mdev;
 170
 171         mdev = to_macio_device(dev);
 172         kfree(mdev);
 173 }
 174
 175 /**
 176  * macio_resource_quirks - tweak or skip some resources for a device
 177  * @np: pointer to the device node
 178  * @res: resulting resource
 179  * @index: index of resource in node
 180  *
 181  * If this routine returns non-null, then the resource is completely
 182  * skipped.
 183  */
 184 static int macio_resource_quirks(struct device_node *np, struct resource *res,
 185                                  int index)
 186 {
 187         /* Only quirks for memory resources for now */
 188         if ((res->flags & IORESOURCE_MEM) == 0)
 189                 return 0;
 190
 191         /* Grand Central has too large resource 0 on some machines */
 192         if (index == 0 && !strcmp(np->name, "gc"))
 193                 res->end = res->start + 0x1ffff;
 194
 195         /* Airport has bogus resource 2 */
 196         if (index >= 2 && !strcmp(np->name, "radio"))
 197                 return 1;
 198
 199 #ifndef CONFIG_PPC64
 200         /* DBDMAs may have bogus sizes */
 201         if ((res->start & 0x0001f000) == 0x00008000)
 202                 res->end = res->start + 0xff;
 203 #endif /* CONFIG_PPC64 */
 204
 205         /* ESCC parent eats child resources. We could have added a
 206          * level of hierarchy, but I don't really feel the need
 207          * for it
 208          */
 209         if (!strcmp(np->name, "escc"))
 210                 return 1;
 211
 212         /* ESCC has bogus resources >= 3 */
 213         if (index >= 3 && !(strcmp(np->name, "ch-a") &&
 214                             strcmp(np->name, "ch-b")))
 215                 return 1;
 216
 217         /* Media bay has too many resources, keep only first one */
 218         if (index > 0 && !strcmp(np->name, "media-bay"))
 219                 return 1;
 220
 221         /* Some older IDE resources have bogus sizes */
 222         if (!(strcmp(np->name, "IDE") && strcmp(np->name, "ATA") &&
 223               strcmp(np->type, "ide") && strcmp(np->type, "ata"))) {
 224                 if (index == 0 && (res->end - res->start) > 0xfff)
 225                         res->end = res->start + 0xfff;
 226                 if (index == 1 && (res->end - res->start) > 0xff)
 227                         res->end = res->start + 0xff;
 228         }
 229         return 0;
 230 }
 231
 232 static void macio_create_fixup_irq(struct macio_dev *dev, int index,
 233                                    unsigned int line)
 234 {
 235         unsigned int irq;
 236
 237         irq = irq_create_mapping(NULL, line);
 238         if (irq != NO_IRQ) {
 239                 dev->interrupt[index].start = irq;
 240                 dev->interrupt[index].flags = IORESOURCE_IRQ;
 241                 dev->interrupt[index].name = dev_name(&dev->ofdev.dev);
 242         }
 243         if (dev->n_interrupts <= index)
 244                 dev->n_interrupts = index + 1;
 245 }
 246
 247 static void macio_add_missing_resources(struct macio_dev *dev)
 248 {
 249         struct device_node *np = dev->ofdev.dev.of_node;
 250         unsigned int irq_base;
 251
 252         /* Gatwick has some missing interrupts on child nodes */
 253         if (dev->bus->chip->type != macio_gatwick)
 254                 return;
 255
 256         /* irq_base is always 64 on gatwick. I have no cleaner way to get
 257          * that value from here at this point
 258          */
 259         irq_base = 64;
 260
 261         /* Fix SCC */
 262         if (strcmp(np->name, "ch-a") == 0) {
 263                 macio_create_fixup_irq(dev, 0, 15 + irq_base);
 264                 macio_create_fixup_irq(dev, 1,  4 + irq_base);
 265                 macio_create_fixup_irq(dev, 2,  5 + irq_base);
 266                 printk(KERN_INFO "macio: fixed SCC irqs on gatwick\n");
 267         }
 268
 269         /* Fix media-bay */
 270         if (strcmp(np->name, "media-bay") == 0) {
 271                 macio_create_fixup_irq(dev, 0, 29 + irq_base);
 272                 printk(KERN_INFO "macio: fixed media-bay irq on gatwick\n");
 273         }
 274
 275         /* Fix left media bay childs */
 276         if (dev->media_bay != NULL && strcmp(np->name, "floppy") == 0) {
 277                 macio_create_fixup_irq(dev, 0, 19 + irq_base);
 278                 macio_create_fixup_irq(dev, 1,  1 + irq_base);
 279                 printk(KERN_INFO "macio: fixed left floppy irqs\n");
 280         }
 281         if (dev->media_bay != NULL && strcasecmp(np->name, "ata4") == 0) {
 282                 macio_create_fixup_irq(dev, 0, 14 + irq_base);
 283                 macio_create_fixup_irq(dev, 0,  3 + irq_base);
 284                 printk(KERN_INFO "macio: fixed left ide irqs\n");
 285         }
 286 }
 287
 288 static void macio_setup_interrupts(struct macio_dev *dev)
 289 {
 290         struct device_node *np = dev->ofdev.dev.of_node;
 291         unsigned int irq;
 292         int i = 0, j = 0;
 293
 294         for (;;) {
 295                 struct resource *res;
 296
 297                 if (j >= MACIO_DEV_COUNT_IRQS)
 298                         break;
 299                 res = &dev->interrupt[j];
 300                 irq = irq_of_parse_and_map(np, i++);
 301                 if (irq == NO_IRQ)
 302                         break;
 303                 res->start = irq;
 304                 res->flags = IORESOURCE_IRQ;
 305                 res->name = dev_name(&dev->ofdev.dev);
 306                 if (macio_resource_quirks(np, res, i - 1)) {
 307                         memset(res, 0, sizeof(struct resource));
 308                         continue;
 309                 } else
 310                         j++;
 311         }
 312         dev->n_interrupts = j;
 313 }
 314
 315 static void macio_setup_resources(struct macio_dev *dev,
 316                                   struct resource *parent_res)
 317 {
 318         struct device_node *np = dev->ofdev.dev.of_node;
 319         struct resource r;
 320         int index;
 321
 322         for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {
 323                 struct resource *res;
 324                 if (index >= MACIO_DEV_COUNT_RESOURCES)
 325                         break;
 326                 res = &dev->resource[index];
 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.dev.of_node = np;
 375         dev->ofdev.archdata.dma_mask = 0xffffffffUL;
 376         dev->ofdev.dev.dma_mask = &dev->ofdev.archdata.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         dev->ofdev.dev.dma_parms = &dev->dma_parms;
 381
 382         /* Standard DMA paremeters */
 383         dma_set_max_seg_size(&dev->ofdev.dev, 65536);
 384         dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff);
 385
 386 #ifdef CONFIG_PCI
 387         /* Set the DMA ops to the ones from the PCI device, this could be
 388          * fishy if we didn't know that on PowerMac it's always direct ops
 389          * or iommu ops that will work fine
 390          *
 391          * To get all the fields, copy all archdata
 392          */
 393         dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata;
 394 #endif /* CONFIG_PCI */
 395
 396 #ifdef DEBUG
 397         printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
 398                dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
 399 #endif
 400
 401         /* MacIO itself has a different reg, we use it's PCI base */
 402         if (np == chip->of_node) {
 403                 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
 404                              chip->lbus.index,
 405 #ifdef CONFIG_PCI
 406                         (unsigned int)pci_resource_start(chip->lbus.pdev, 0),
 407 #else
 408                         0, /* NuBus may want to do something better here */
 409 #endif
 410                         MAX_NODE_NAME_SIZE, np->name);
 411         } else {
 412                 reg = of_get_property(np, "reg", NULL);
 413                 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
 414                              chip->lbus.index,
 415                              reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name);
 416         }
 417
 418         /* Setup interrupts & resources */
 419         macio_setup_interrupts(dev);
 420         macio_setup_resources(dev, parent_res);
 421         macio_add_missing_resources(dev);
 422
 423         /* Register with core */
 424         if (of_device_register(&dev->ofdev) != 0) {
 425                 printk(KERN_DEBUG"macio: device registration error for %s!\n",
 426                        dev_name(&dev->ofdev.dev));
 427                 kfree(dev);
 428                 return NULL;
 429         }
 430
 431         return dev;
 432 }
 433
 434 static int macio_skip_device(struct device_node *np)
 435 {
 436         if (strncmp(np->name, "battery", 7) == 0)
 437                 return 1;
 438         if (strncmp(np->name, "escc-legacy", 11) == 0)
 439                 return 1;
 440         return 0;
 441 }
 442
 443 /**
 444  * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
 445  * @chip: pointer to the macio_chip holding the devices
 446  *
 447  * This function will do the job of extracting devices from the
 448  * Open Firmware device tree, build macio_dev structures and add
 449  * them to the Linux device tree.
 450  *
 451  * For now, childs of media-bay are added now as well. This will
 452  * change rsn though.
 453  */
 454 static void macio_pci_add_devices(struct macio_chip *chip)
 455 {
 456         struct device_node *np, *pnode;
 457         struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
 458         struct device *parent = NULL;
 459         struct resource *root_res = &iomem_resource;
 460
 461         /* Add a node for the macio bus itself */
 462 #ifdef CONFIG_PCI
 463         if (chip->lbus.pdev) {
 464                 parent = &chip->lbus.pdev->dev;
 465                 root_res = &chip->lbus.pdev->resource[0];
 466         }
 467 #endif
 468         pnode = of_node_get(chip->of_node);
 469         if (pnode == NULL)
 470                 return;
 471
 472         /* Add macio itself to hierarchy */
 473         rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
 474         if (rdev == NULL)
 475                 return;
 476         root_res = &rdev->resource[0];
 477
 478         /* First scan 1st level */
 479         for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
 480                 if (macio_skip_device(np))
 481                         continue;
 482                 of_node_get(np);
 483                 mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
 484                                             root_res);
 485                 if (mdev == NULL)
 486                         of_node_put(np);
 487                 else if (strncmp(np->name, "media-bay", 9) == 0)
 488                         mbdev = mdev;
 489                 else if (strncmp(np->name, "escc", 4) == 0)
 490                         sdev = mdev;
 491         }
 492
 493         /* Add media bay devices if any */
 494         if (mbdev) {
 495                 pnode = mbdev->ofdev.dev.of_node;
 496                 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
 497                         if (macio_skip_device(np))
 498                                 continue;
 499                         of_node_get(np);
 500                         if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
 501                                                  mbdev,  root_res) == NULL)
 502                                 of_node_put(np);
 503                 }
 504         }
 505
 506         /* Add serial ports if any */
 507         if (sdev) {
 508                 pnode = sdev->ofdev.dev.of_node;
 509                 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
 510                         if (macio_skip_device(np))
 511                                 continue;
 512                         of_node_get(np);
 513                         if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
 514                                                  NULL, root_res) == NULL)
 515                                 of_node_put(np);
 516                 }
 517         }
 518 }
 519
 520
 521 /**
 522  * macio_register_driver - Registers a new MacIO device driver
 523  * @drv: pointer to the driver definition structure
 524  */
 525 int macio_register_driver(struct macio_driver *drv)
 526 {
 527         /* initialize common driver fields */
 528         drv->driver.bus = &macio_bus_type;
 529
 530         /* register with core */
 531         return driver_register(&drv->driver);
 532 }
 533
 534 /**
 535  * macio_unregister_driver - Unregisters a new MacIO device driver
 536  * @drv: pointer to the driver definition structure
 537  */
 538 void macio_unregister_driver(struct macio_driver *drv)
 539 {
 540         driver_unregister(&drv->driver);
 541 }
 542
 543 /* Managed MacIO resources */
 544 struct macio_devres {
 545         u32     res_mask;
 546 };
 547
 548 static void maciom_release(struct device *gendev, void *res)
 549 {
 550         struct macio_dev *dev = to_macio_device(gendev);
 551         struct macio_devres *dr = res;
 552         int i, max;
 553
 554         max = min(dev->n_resources, 32);
 555         for (i = 0; i < max; i++) {
 556                 if (dr->res_mask & (1 << i))
 557                         macio_release_resource(dev, i);
 558         }
 559 }
 560
 561 int macio_enable_devres(struct macio_dev *dev)
 562 {
 563         struct macio_devres *dr;
 564
 565         dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
 566         if (!dr) {
 567                 dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL);
 568                 if (!dr)
 569                         return -ENOMEM;
 570         }
 571         return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL;
 572 }
 573
 574 static struct macio_devres * find_macio_dr(struct macio_dev *dev)
 575 {
 576         return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
 577 }
 578
 579 /**
 580  *      macio_request_resource - Request an MMIO resource
 581  *      @dev: pointer to the device holding the resource
 582  *      @resource_no: resource number to request
 583  *      @name: resource name
 584  *
 585  *      Mark  memory region number @resource_no associated with MacIO
 586  *      device @dev as being reserved by owner @name.  Do not access
 587  *      any address inside the memory regions unless this call returns
 588  *      successfully.
 589  *
 590  *      Returns 0 on success, or %EBUSY on error.  A warning
 591  *      message is also printed on failure.
 592  */
 593 int macio_request_resource(struct macio_dev *dev, int resource_no,
 594                            const char *name)
 595 {
 596         struct macio_devres *dr = find_macio_dr(dev);
 597
 598         if (macio_resource_len(dev, resource_no) == 0)
 599                 return 0;
 600
 601         if (!request_mem_region(macio_resource_start(dev, resource_no),
 602                                 macio_resource_len(dev, resource_no),
 603                                 name))
 604                 goto err_out;
 605
 606         if (dr && resource_no < 32)
 607                 dr->res_mask |= 1 << resource_no;
 608
 609         return 0;
 610
 611 err_out:
 612         printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
 613                 " for device %s\n",
 614                 resource_no,
 615                 macio_resource_len(dev, resource_no),
 616                 macio_resource_start(dev, resource_no),
 617                 dev_name(&dev->ofdev.dev));
 618         return -EBUSY;
 619 }
 620
 621 /**
 622  * macio_release_resource - Release an MMIO resource
 623  * @dev: pointer to the device holding the resource
 624  * @resource_no: resource number to release
 625  */
 626 void macio_release_resource(struct macio_dev *dev, int resource_no)
 627 {
 628         struct macio_devres *dr = find_macio_dr(dev);
 629
 630         if (macio_resource_len(dev, resource_no) == 0)
 631                 return;
 632         release_mem_region(macio_resource_start(dev, resource_no),
 633                            macio_resource_len(dev, resource_no));
 634         if (dr && resource_no < 32)
 635                 dr->res_mask &= ~(1 << resource_no);
 636 }
 637
 638 /**
 639  *      macio_request_resources - Reserve all memory resources
 640  *      @dev: MacIO device whose resources are to be reserved
 641  *      @name: Name to be associated with resource.
 642  *
 643  *      Mark all memory regions associated with MacIO device @dev as
 644  *      being reserved by owner @name.  Do not access any address inside
 645  *      the memory regions unless this call returns successfully.
 646  *
 647  *      Returns 0 on success, or %EBUSY on error.  A warning
 648  *      message is also printed on failure.
 649  */
 650 int macio_request_resources(struct macio_dev *dev, const char *name)
 651 {
 652         int i;
 653
 654         for (i = 0; i < dev->n_resources; i++)
 655                 if (macio_request_resource(dev, i, name))
 656                         goto err_out;
 657         return 0;
 658
 659 err_out:
 660         while(--i >= 0)
 661                 macio_release_resource(dev, i);
 662
 663         return -EBUSY;
 664 }
 665
 666 /**
 667  *      macio_release_resources - Release reserved memory resources
 668  *      @dev: MacIO device whose resources were previously reserved
 669  */
 670
 671 void macio_release_resources(struct macio_dev *dev)
 672 {
 673         int i;
 674
 675         for (i = 0; i < dev->n_resources; i++)
 676                 macio_release_resource(dev, i);
 677 }
 678
 679
 680 #ifdef CONFIG_PCI
 681
 682 static int __devinit macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 683 {
 684         struct device_node* np;
 685         struct macio_chip* chip;
 686
 687         if (ent->vendor != PCI_VENDOR_ID_APPLE)
 688                 return -ENODEV;
 689
 690         /* Note regarding refcounting: We assume pci_device_to_OF_node() is
 691          * ported to new OF APIs and returns a node with refcount incremented.
 692          */
 693         np = pci_device_to_OF_node(pdev);
 694         if (np == NULL)
 695                 return -ENODEV;
 696
 697         /* The above assumption is wrong !!!
 698          * fix that here for now until I fix the arch code
 699          */
 700         of_node_get(np);
 701
 702         /* We also assume that pmac_feature will have done a get() on nodes
 703          * stored in the macio chips array
 704          */
 705         chip = macio_find(np, macio_unknown);
 706         of_node_put(np);
 707         if (chip == NULL)
 708                 return -ENODEV;
 709
 710         /* XXX Need locking ??? */
 711         if (chip->lbus.pdev == NULL) {
 712                 chip->lbus.pdev = pdev;
 713                 chip->lbus.chip = chip;
 714                 pci_set_drvdata(pdev, &chip->lbus);
 715                 pci_set_master(pdev);
 716         }
 717
 718         printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
 719                 chip->name);
 720
 721         /*
 722          * HACK ALERT: The WallStreet PowerBook and some OHare based machines
 723          * have 2 macio ASICs. I must probe the "main" one first or IDE
 724          * ordering will be incorrect. So I put on "hold" the second one since
 725          * it seem to appear first on PCI
 726          */
 727         if (chip->type == macio_gatwick || chip->type == macio_ohareII)
 728                 if (macio_chips[0].lbus.pdev == NULL) {
 729                         macio_on_hold = chip;
 730                         return 0;
 731                 }
 732
 733         macio_pci_add_devices(chip);
 734         if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
 735                 macio_pci_add_devices(macio_on_hold);
 736                 macio_on_hold = NULL;
 737         }
 738
 739         return 0;
 740 }
 741
 742 static void __devexit macio_pci_remove(struct pci_dev* pdev)
 743 {
 744         panic("removing of macio-asic not supported !\n");
 745 }
 746
 747 /*
 748  * MacIO is matched against any Apple ID, it's probe() function
 749  * will then decide wether it applies or not
 750  */
 751 static const struct pci_device_id __devinitdata pci_ids [] = { {
 752         .vendor         = PCI_VENDOR_ID_APPLE,
 753         .device         = PCI_ANY_ID,
 754         .subvendor      = PCI_ANY_ID,
 755         .subdevice      = PCI_ANY_ID,
 756
 757         }, { /* end: all zeroes */ }
 758 };
 759 MODULE_DEVICE_TABLE (pci, pci_ids);
 760
 761 /* pci driver glue; this is a "new style" PCI driver module */
 762 static struct pci_driver macio_pci_driver = {
 763         .name           = (char *) "macio",
 764         .id_table       = pci_ids,
 765
 766         .probe          = macio_pci_probe,
 767         .remove         = macio_pci_remove,
 768 };
 769
 770 #endif /* CONFIG_PCI */
 771
 772 static int __init macio_module_init (void)
 773 {
 774 #ifdef CONFIG_PCI
 775         int rc;
 776
 777         rc = pci_register_driver(&macio_pci_driver);
 778         if (rc)
 779                 return rc;
 780 #endif /* CONFIG_PCI */
 781         return 0;
 782 }
 783
 784 module_init(macio_module_init);
 785
 786 EXPORT_SYMBOL(macio_register_driver);
 787 EXPORT_SYMBOL(macio_unregister_driver);
 788 EXPORT_SYMBOL(macio_dev_get);
 789 EXPORT_SYMBOL(macio_dev_put);
 790 EXPORT_SYMBOL(macio_request_resource);
 791 EXPORT_SYMBOL(macio_release_resource);
 792 EXPORT_SYMBOL(macio_request_resources);
 793 EXPORT_SYMBOL(macio_release_resources);
 794 EXPORT_SYMBOL(macio_enable_devres);
 795