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;
 298
 299                 if (j >= MACIO_DEV_COUNT_IRQS)
 300                         break;
 301                 res = &dev->interrupt[j];
 302                 irq = irq_of_parse_and_map(np, i++);
 303                 if (irq == NO_IRQ)
 304                         break;
 305                 res->start = irq;
 306                 res->flags = IORESOURCE_IRQ;
 307                 res->name = dev_name(&dev->ofdev.dev);
 308                 if (macio_resource_quirks(np, res, i - 1)) {
 309                         memset(res, 0, sizeof(struct resource));
 310                         continue;
 311                 } else
 312                         j++;
 313         }
 314         dev->n_interrupts = j;
 315 }
 316
 317 static void macio_setup_resources(struct macio_dev *dev,
 318                                   struct resource *parent_res)
 319 {
 320         struct device_node *np = dev->ofdev.node;
 321         struct resource r;
 322         int index;
 323
 324         for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {
 325                 struct resource *res;
 326                 if (index >= MACIO_DEV_COUNT_RESOURCES)
 327                         break;
 328                 res = &dev->resource[index];
 329                 *res = r;
 330                 res->name = dev_name(&dev->ofdev.dev);
 331
 332                 if (macio_resource_quirks(np, res, index)) {
 333                         memset(res, 0, sizeof(struct resource));
 334                         continue;
 335                 }
 336                 /* Currently, we consider failure as harmless, this may
 337                  * change in the future, once I've found all the device
 338                  * tree bugs in older machines & worked around them
 339                  */
 340                 if (insert_resource(parent_res, res)) {
 341                         printk(KERN_WARNING "Can't request resource "
 342                                "%d for MacIO device %s\n",
 343                                index, dev_name(&dev->ofdev.dev));
 344                 }
 345         }
 346         dev->n_resources = index;
 347 }
 348
 349 /**
 350  * macio_add_one_device - Add one device from OF node to the device tree
 351  * @chip: pointer to the macio_chip holding the device
 352  * @np: pointer to the device node in the OF tree
 353  * @in_bay: set to 1 if device is part of a media-bay
 354  *
 355  * When media-bay is changed to hotswap drivers, this function will
 356  * be exposed to the bay driver some way...
 357  */
 358 static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
 359                                                struct device *parent,
 360                                                struct device_node *np,
 361                                                struct macio_dev *in_bay,
 362                                                struct resource *parent_res)
 363 {
 364         struct macio_dev *dev;
 365         const u32 *reg;
 366
 367         if (np == NULL)
 368                 return NULL;
 369
 370         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 371         if (!dev)
 372                 return NULL;
 373
 374         dev->bus = &chip->lbus;
 375         dev->media_bay = in_bay;
 376         dev->ofdev.node = np;
 377         dev->ofdev.dma_mask = 0xffffffffUL;
 378         dev->ofdev.dev.dma_mask = &dev->ofdev.dma_mask;
 379         dev->ofdev.dev.parent = parent;
 380         dev->ofdev.dev.bus = &macio_bus_type;
 381         dev->ofdev.dev.release = macio_release_dev;
 382         dev->ofdev.dev.dma_parms = &dev->dma_parms;
 383
 384         /* Standard DMA paremeters */
 385         dma_set_max_seg_size(&dev->ofdev.dev, 65536);
 386         dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff);
 387
 388 #ifdef CONFIG_PCI
 389         /* Set the DMA ops to the ones from the PCI device, this could be
 390          * fishy if we didn't know that on PowerMac it's always direct ops
 391          * or iommu ops that will work fine
 392          */
 393         dev->ofdev.dev.archdata.dma_ops =
 394                 chip->lbus.pdev->dev.archdata.dma_ops;
 395         dev->ofdev.dev.archdata.dma_data =
 396                 chip->lbus.pdev->dev.archdata.dma_data;
 397 #endif /* CONFIG_PCI */
 398
 399 #ifdef DEBUG
 400         printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
 401                dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
 402 #endif
 403
 404         /* MacIO itself has a different reg, we use it's PCI base */
 405         if (np == chip->of_node) {
 406                 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
 407                              chip->lbus.index,
 408 #ifdef CONFIG_PCI
 409                         (unsigned int)pci_resource_start(chip->lbus.pdev, 0),
 410 #else
 411                         0, /* NuBus may want to do something better here */
 412 #endif
 413                         MAX_NODE_NAME_SIZE, np->name);
 414         } else {
 415                 reg = of_get_property(np, "reg", NULL);
 416                 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
 417                              chip->lbus.index,
 418                              reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name);
 419         }
 420
 421         /* Setup interrupts & resources */
 422         macio_setup_interrupts(dev);
 423         macio_setup_resources(dev, parent_res);
 424         macio_add_missing_resources(dev);
 425
 426         /* Register with core */
 427         if (of_device_register(&dev->ofdev) != 0) {
 428                 printk(KERN_DEBUG"macio: device registration error for %s!\n",
 429                        dev_name(&dev->ofdev.dev));
 430                 kfree(dev);
 431                 return NULL;
 432         }
 433
 434         return dev;
 435 }
 436
 437 static int macio_skip_device(struct device_node *np)
 438 {
 439         if (strncmp(np->name, "battery", 7) == 0)
 440                 return 1;
 441         if (strncmp(np->name, "escc-legacy", 11) == 0)
 442                 return 1;
 443         return 0;
 444 }
 445
 446 /**
 447  * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
 448  * @chip: pointer to the macio_chip holding the devices
 449  *
 450  * This function will do the job of extracting devices from the
 451  * Open Firmware device tree, build macio_dev structures and add
 452  * them to the Linux device tree.
 453  *
 454  * For now, childs of media-bay are added now as well. This will
 455  * change rsn though.
 456  */
 457 static void macio_pci_add_devices(struct macio_chip *chip)
 458 {
 459         struct device_node *np, *pnode;
 460         struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
 461         struct device *parent = NULL;
 462         struct resource *root_res = &iomem_resource;
 463
 464         /* Add a node for the macio bus itself */
 465 #ifdef CONFIG_PCI
 466         if (chip->lbus.pdev) {
 467                 parent = &chip->lbus.pdev->dev;
 468                 root_res = &chip->lbus.pdev->resource[0];
 469         }
 470 #endif
 471         pnode = of_node_get(chip->of_node);
 472         if (pnode == NULL)
 473                 return;
 474
 475         /* Add macio itself to hierarchy */
 476         rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
 477         if (rdev == NULL)
 478                 return;
 479         root_res = &rdev->resource[0];
 480
 481         /* First scan 1st level */
 482         for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
 483                 if (macio_skip_device(np))
 484                         continue;
 485                 of_node_get(np);
 486                 mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
 487                                             root_res);
 488                 if (mdev == NULL)
 489                         of_node_put(np);
 490                 else if (strncmp(np->name, "media-bay", 9) == 0)
 491                         mbdev = mdev;
 492                 else if (strncmp(np->name, "escc", 4) == 0)
 493                         sdev = mdev;
 494         }
 495
 496         /* Add media bay devices if any */
 497         if (mbdev)
 498                 for (np = NULL; (np = of_get_next_child(mbdev->ofdev.node, np))
 499                              != NULL;) {
 500                         if (macio_skip_device(np))
 501                                 continue;
 502                         of_node_get(np);
 503                         if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
 504                                                  mbdev,  root_res) == NULL)
 505                                 of_node_put(np);
 506                 }
 507
 508         /* Add serial ports if any */
 509         if (sdev) {
 510                 for (np = NULL; (np = of_get_next_child(sdev->ofdev.node, np))
 511                              != NULL;) {
 512                         if (macio_skip_device(np))
 513                                 continue;
 514                         of_node_get(np);
 515                         if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
 516                                                  NULL, root_res) == NULL)
 517                                 of_node_put(np);
 518                 }
 519         }
 520 }
 521
 522
 523 /**
 524  * macio_register_driver - Registers a new MacIO device driver
 525  * @drv: pointer to the driver definition structure
 526  */
 527 int macio_register_driver(struct macio_driver *drv)
 528 {
 529         /* initialize common driver fields */
 530         drv->driver.name = drv->name;
 531         drv->driver.bus = &macio_bus_type;
 532
 533         /* register with core */
 534         return driver_register(&drv->driver);
 535 }
 536
 537 /**
 538  * macio_unregister_driver - Unregisters a new MacIO device driver
 539  * @drv: pointer to the driver definition structure
 540  */
 541 void macio_unregister_driver(struct macio_driver *drv)
 542 {
 543         driver_unregister(&drv->driver);
 544 }
 545
 546 /* Managed MacIO resources */
 547 struct macio_devres {
 548         u32     res_mask;
 549 };
 550
 551 static void maciom_release(struct device *gendev, void *res)
 552 {
 553         struct macio_dev *dev = to_macio_device(gendev);
 554         struct macio_devres *dr = res;
 555         int i, max;
 556
 557         max = min(dev->n_resources, 32);
 558         for (i = 0; i < max; i++) {
 559                 if (dr->res_mask & (1 << i))
 560                         macio_release_resource(dev, i);
 561         }
 562 }
 563
 564 int macio_enable_devres(struct macio_dev *dev)
 565 {
 566         struct macio_devres *dr;
 567
 568         dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
 569         if (!dr) {
 570                 dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL);
 571                 if (!dr)
 572                         return -ENOMEM;
 573         }
 574         return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL;
 575 }
 576
 577 static struct macio_devres * find_macio_dr(struct macio_dev *dev)
 578 {
 579         return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
 580 }
 581
 582 /**
 583  *      macio_request_resource - Request an MMIO resource
 584  *      @dev: pointer to the device holding the resource
 585  *      @resource_no: resource number to request
 586  *      @name: resource name
 587  *
 588  *      Mark  memory region number @resource_no associated with MacIO
 589  *      device @dev as being reserved by owner @name.  Do not access
 590  *      any address inside the memory regions unless this call returns
 591  *      successfully.
 592  *
 593  *      Returns 0 on success, or %EBUSY on error.  A warning
 594  *      message is also printed on failure.
 595  */
 596 int macio_request_resource(struct macio_dev *dev, int resource_no,
 597                            const char *name)
 598 {
 599         struct macio_devres *dr = find_macio_dr(dev);
 600
 601         if (macio_resource_len(dev, resource_no) == 0)
 602                 return 0;
 603
 604         if (!request_mem_region(macio_resource_start(dev, resource_no),
 605                                 macio_resource_len(dev, resource_no),
 606                                 name))
 607                 goto err_out;
 608
 609         if (dr && resource_no < 32)
 610                 dr->res_mask |= 1 << resource_no;
 611
 612         return 0;
 613
 614 err_out:
 615         printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
 616                 " for device %s\n",
 617                 resource_no,
 618                 macio_resource_len(dev, resource_no),
 619                 macio_resource_start(dev, resource_no),
 620                 dev_name(&dev->ofdev.dev));
 621         return -EBUSY;
 622 }
 623
 624 /**
 625  * macio_release_resource - Release an MMIO resource
 626  * @dev: pointer to the device holding the resource
 627  * @resource_no: resource number to release
 628  */
 629 void macio_release_resource(struct macio_dev *dev, int resource_no)
 630 {
 631         struct macio_devres *dr = find_macio_dr(dev);
 632
 633         if (macio_resource_len(dev, resource_no) == 0)
 634                 return;
 635         release_mem_region(macio_resource_start(dev, resource_no),
 636                            macio_resource_len(dev, resource_no));
 637         if (dr && resource_no < 32)
 638                 dr->res_mask &= ~(1 << resource_no);
 639 }
 640
 641 /**
 642  *      macio_request_resources - Reserve all memory resources
 643  *      @dev: MacIO device whose resources are to be reserved
 644  *      @name: Name to be associated with resource.
 645  *
 646  *      Mark all memory regions associated with MacIO device @dev as
 647  *      being reserved by owner @name.  Do not access any address inside
 648  *      the memory regions unless this call returns successfully.
 649  *
 650  *      Returns 0 on success, or %EBUSY on error.  A warning
 651  *      message is also printed on failure.
 652  */
 653 int macio_request_resources(struct macio_dev *dev, const char *name)
 654 {
 655         int i;
 656
 657         for (i = 0; i < dev->n_resources; i++)
 658                 if (macio_request_resource(dev, i, name))
 659                         goto err_out;
 660         return 0;
 661
 662 err_out:
 663         while(--i >= 0)
 664                 macio_release_resource(dev, i);
 665
 666         return -EBUSY;
 667 }
 668
 669 /**
 670  *      macio_release_resources - Release reserved memory resources
 671  *      @dev: MacIO device whose resources were previously reserved
 672  */
 673
 674 void macio_release_resources(struct macio_dev *dev)
 675 {
 676         int i;
 677
 678         for (i = 0; i < dev->n_resources; i++)
 679                 macio_release_resource(dev, i);
 680 }
 681
 682
 683 #ifdef CONFIG_PCI
 684
 685 static int __devinit macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 686 {
 687         struct device_node* np;
 688         struct macio_chip* chip;
 689
 690         if (ent->vendor != PCI_VENDOR_ID_APPLE)
 691                 return -ENODEV;
 692
 693         /* Note regarding refcounting: We assume pci_device_to_OF_node() is
 694          * ported to new OF APIs and returns a node with refcount incremented.
 695          */
 696         np = pci_device_to_OF_node(pdev);
 697         if (np == NULL)
 698                 return -ENODEV;
 699
 700         /* The above assumption is wrong !!!
 701          * fix that here for now until I fix the arch code
 702          */
 703         of_node_get(np);
 704
 705         /* We also assume that pmac_feature will have done a get() on nodes
 706          * stored in the macio chips array
 707          */
 708         chip = macio_find(np, macio_unknown);
 709         of_node_put(np);
 710         if (chip == NULL)
 711                 return -ENODEV;
 712
 713         /* XXX Need locking ??? */
 714         if (chip->lbus.pdev == NULL) {
 715                 chip->lbus.pdev = pdev;
 716                 chip->lbus.chip = chip;
 717                 pci_set_drvdata(pdev, &chip->lbus);
 718                 pci_set_master(pdev);
 719         }
 720
 721         printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
 722                 chip->name);
 723
 724         /*
 725          * HACK ALERT: The WallStreet PowerBook and some OHare based machines
 726          * have 2 macio ASICs. I must probe the "main" one first or IDE
 727          * ordering will be incorrect. So I put on "hold" the second one since
 728          * it seem to appear first on PCI
 729          */
 730         if (chip->type == macio_gatwick || chip->type == macio_ohareII)
 731                 if (macio_chips[0].lbus.pdev == NULL) {
 732                         macio_on_hold = chip;
 733                         return 0;
 734                 }
 735
 736         macio_pci_add_devices(chip);
 737         if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
 738                 macio_pci_add_devices(macio_on_hold);
 739                 macio_on_hold = NULL;
 740         }
 741
 742         return 0;
 743 }
 744
 745 static void __devexit macio_pci_remove(struct pci_dev* pdev)
 746 {
 747         panic("removing of macio-asic not supported !\n");
 748 }
 749
 750 /*
 751  * MacIO is matched against any Apple ID, it's probe() function
 752  * will then decide wether it applies or not
 753  */
 754 static const struct pci_device_id __devinitdata pci_ids [] = { {
 755         .vendor         = PCI_VENDOR_ID_APPLE,
 756         .device         = PCI_ANY_ID,
 757         .subvendor      = PCI_ANY_ID,
 758         .subdevice      = PCI_ANY_ID,
 759
 760         }, { /* end: all zeroes */ }
 761 };
 762 MODULE_DEVICE_TABLE (pci, pci_ids);
 763
 764 /* pci driver glue; this is a "new style" PCI driver module */
 765 static struct pci_driver macio_pci_driver = {
 766         .name           = (char *) "macio",
 767         .id_table       = pci_ids,
 768
 769         .probe          = macio_pci_probe,
 770         .remove         = macio_pci_remove,
 771 };
 772
 773 #endif /* CONFIG_PCI */
 774
 775 static int __init macio_module_init (void)
 776 {
 777 #ifdef CONFIG_PCI
 778         int rc;
 779
 780         rc = pci_register_driver(&macio_pci_driver);
 781         if (rc)
 782                 return rc;
 783 #endif /* CONFIG_PCI */
 784         return 0;
 785 }
 786
 787 module_init(macio_module_init);
 788
 789 EXPORT_SYMBOL(macio_register_driver);
 790 EXPORT_SYMBOL(macio_unregister_driver);
 791 EXPORT_SYMBOL(macio_dev_get);
 792 EXPORT_SYMBOL(macio_dev_put);
 793 EXPORT_SYMBOL(macio_request_resource);
 794 EXPORT_SYMBOL(macio_release_resource);
 795 EXPORT_SYMBOL(macio_request_resources);
 796 EXPORT_SYMBOL(macio_release_resources);
 797 EXPORT_SYMBOL(macio_enable_devres);
 798