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 #include <linux/of_address.h>
  28 #include <linux/of_irq.h>
  29
  30 #include <asm/machdep.h>
  31 #include <asm/macio.h>
  32 #include <asm/pmac_feature.h>
  33 #include <asm/prom.h>
  34
  35 #undef DEBUG
  36
  37 #define MAX_NODE_NAME_SIZE (20 - 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         const struct of_device_id * matches = drv->of_match_table;
  44
  45         if (!matches)
  46                 return 0;
  47
  48         return of_match_device(matches, dev) != NULL;
  49 }
  50
  51 struct macio_dev *macio_dev_get(struct macio_dev *dev)
  52 {
  53         struct device *tmp;
  54
  55         if (!dev)
  56                 return NULL;
  57         tmp = get_device(&dev->ofdev.dev);
  58         if (tmp)
  59                 return to_macio_device(tmp);
  60         else
  61                 return NULL;
  62 }
  63
  64 void macio_dev_put(struct macio_dev *dev)
  65 {
  66         if (dev)
  67                 put_device(&dev->ofdev.dev);
  68 }
  69
  70
  71 static int macio_device_probe(struct device *dev)
  72 {
  73         int error = -ENODEV;
  74         struct macio_driver *drv;
  75         struct macio_dev *macio_dev;
  76         const struct of_device_id *match;
  77
  78         drv = to_macio_driver(dev->driver);
  79         macio_dev = to_macio_device(dev);
  80
  81         if (!drv->probe)
  82                 return error;
  83
  84         macio_dev_get(macio_dev);
  85
  86         match = of_match_device(drv->driver.of_match_table, dev);
  87         if (match)
  88                 error = drv->probe(macio_dev, match);
  89         if (error)
  90                 macio_dev_put(macio_dev);
  91
  92         return error;
  93 }
  94
  95 static int macio_device_remove(struct device *dev)
  96 {
  97         struct macio_dev * macio_dev = to_macio_device(dev);
  98         struct macio_driver * drv = to_macio_driver(dev->driver);
  99
 100         if (dev->driver && drv->remove)
 101                 drv->remove(macio_dev);
 102         macio_dev_put(macio_dev);
 103
 104         return 0;
 105 }
 106
 107 static void macio_device_shutdown(struct device *dev)
 108 {
 109         struct macio_dev * macio_dev = to_macio_device(dev);
 110         struct macio_driver * drv = to_macio_driver(dev->driver);
 111
 112         if (dev->driver && drv->shutdown)
 113                 drv->shutdown(macio_dev);
 114 }
 115
 116 static int macio_device_suspend(struct device *dev, pm_message_t state)
 117 {
 118         struct macio_dev * macio_dev = to_macio_device(dev);
 119         struct macio_driver * drv = to_macio_driver(dev->driver);
 120
 121         if (dev->driver && drv->suspend)
 122                 return drv->suspend(macio_dev, state);
 123         return 0;
 124 }
 125
 126 static int macio_device_resume(struct device * dev)
 127 {
 128         struct macio_dev * macio_dev = to_macio_device(dev);
 129         struct macio_driver * drv = to_macio_driver(dev->driver);
 130
 131         if (dev->driver && drv->resume)
 132                 return drv->resume(macio_dev);
 133         return 0;
 134 }
 135
 136 extern const struct attribute_group *macio_dev_groups[];
 137
 138 struct bus_type macio_bus_type = {
 139        .name    = "macio",
 140        .match   = macio_bus_match,
 141        .uevent = of_device_uevent_modalias,
 142        .probe   = macio_device_probe,
 143        .remove  = macio_device_remove,
 144        .shutdown = macio_device_shutdown,
 145        .suspend = macio_device_suspend,
 146        .resume  = macio_device_resume,
 147        .dev_groups = macio_dev_groups,
 148 };
 149
 150 static int __init macio_bus_driver_init(void)
 151 {
 152         return bus_register(&macio_bus_type);
 153 }
 154
 155 postcore_initcall(macio_bus_driver_init);
 156
 157
 158 /**
 159  * macio_release_dev - free a macio device structure when all users of it are
 160  * finished.
 161  * @dev: device that's been disconnected
 162  *
 163  * Will be called only by the device core when all users of this macio device
 164  * are done. This currently means never as we don't hot remove any macio
 165  * device yet, though that will happen with mediabay based devices in a later
 166  * implementation.
 167  */
 168 static void macio_release_dev(struct device *dev)
 169 {
 170         struct macio_dev *mdev;
 171
 172         mdev = to_macio_device(dev);
 173         kfree(mdev);
 174 }
 175
 176 /**
 177  * macio_resource_quirks - tweak or skip some resources for a device
 178  * @np: pointer to the device node
 179  * @res: resulting resource
 180  * @index: index of resource in node
 181  *
 182  * If this routine returns non-null, then the resource is completely
 183  * skipped.
 184  */
 185 static int macio_resource_quirks(struct device_node *np, struct resource *res,
 186                                  int index)
 187 {
 188         /* Only quirks for memory resources for now */
 189         if ((res->flags & IORESOURCE_MEM) == 0)
 190                 return 0;
 191
 192         /* Grand Central has too large resource 0 on some machines */
 193         if (index == 0 && !strcmp(np->name, "gc"))
 194                 res->end = res->start + 0x1ffff;
 195
 196         /* Airport has bogus resource 2 */
 197         if (index >= 2 && !strcmp(np->name, "radio"))
 198                 return 1;
 199
 200 #ifndef CONFIG_PPC64
 201         /* DBDMAs may have bogus sizes */
 202         if ((res->start & 0x0001f000) == 0x00008000)
 203                 res->end = res->start + 0xff;
 204 #endif /* CONFIG_PPC64 */
 205
 206         /* ESCC parent eats child resources. We could have added a
 207          * level of hierarchy, but I don't really feel the need
 208          * for it
 209          */
 210         if (!strcmp(np->name, "escc"))
 211                 return 1;
 212
 213         /* ESCC has bogus resources >= 3 */
 214         if (index >= 3 && !(strcmp(np->name, "ch-a") &&
 215                             strcmp(np->name, "ch-b")))
 216                 return 1;
 217
 218         /* Media bay has too many resources, keep only first one */
 219         if (index > 0 && !strcmp(np->name, "media-bay"))
 220                 return 1;
 221
 222         /* Some older IDE resources have bogus sizes */
 223         if (!(strcmp(np->name, "IDE") && strcmp(np->name, "ATA") &&
 224               strcmp(np->type, "ide") && strcmp(np->type, "ata"))) {
 225                 if (index == 0 && (res->end - res->start) > 0xfff)
 226                         res->end = res->start + 0xfff;
 227                 if (index == 1 && (res->end - res->start) > 0xff)
 228                         res->end = res->start + 0xff;
 229         }
 230         return 0;
 231 }
 232
 233 static void macio_create_fixup_irq(struct macio_dev *dev, int index,
 234                                    unsigned int line)
 235 {
 236         unsigned int irq;
 237
 238         irq = irq_create_mapping(NULL, line);
 239         if (!irq) {
 240                 dev->interrupt[index].start = irq;
 241                 dev->interrupt[index].flags = IORESOURCE_IRQ;
 242                 dev->interrupt[index].name = dev_name(&dev->ofdev.dev);
 243         }
 244         if (dev->n_interrupts <= index)
 245                 dev->n_interrupts = index + 1;
 246 }
 247
 248 static void macio_add_missing_resources(struct macio_dev *dev)
 249 {
 250         struct device_node *np = dev->ofdev.dev.of_node;
 251         unsigned int irq_base;
 252
 253         /* Gatwick has some missing interrupts on child nodes */
 254         if (dev->bus->chip->type != macio_gatwick)
 255                 return;
 256
 257         /* irq_base is always 64 on gatwick. I have no cleaner way to get
 258          * that value from here at this point
 259          */
 260         irq_base = 64;
 261
 262         /* Fix SCC */
 263         if (strcmp(np->name, "ch-a") == 0) {
 264                 macio_create_fixup_irq(dev, 0, 15 + irq_base);
 265                 macio_create_fixup_irq(dev, 1,  4 + irq_base);
 266                 macio_create_fixup_irq(dev, 2,  5 + irq_base);
 267                 printk(KERN_INFO "macio: fixed SCC irqs on gatwick\n");
 268         }
 269
 270         /* Fix media-bay */
 271         if (strcmp(np->name, "media-bay") == 0) {
 272                 macio_create_fixup_irq(dev, 0, 29 + irq_base);
 273                 printk(KERN_INFO "macio: fixed media-bay irq on gatwick\n");
 274         }
 275
 276         /* Fix left media bay childs */
 277         if (dev->media_bay != NULL && strcmp(np->name, "floppy") == 0) {
 278                 macio_create_fixup_irq(dev, 0, 19 + irq_base);
 279                 macio_create_fixup_irq(dev, 1,  1 + irq_base);
 280                 printk(KERN_INFO "macio: fixed left floppy irqs\n");
 281         }
 282         if (dev->media_bay != NULL && strcasecmp(np->name, "ata4") == 0) {
 283                 macio_create_fixup_irq(dev, 0, 14 + irq_base);
 284                 macio_create_fixup_irq(dev, 0,  3 + irq_base);
 285                 printk(KERN_INFO "macio: fixed left ide irqs\n");
 286         }
 287 }
 288
 289 static void macio_setup_interrupts(struct macio_dev *dev)
 290 {
 291         struct device_node *np = dev->ofdev.dev.of_node;
 292         unsigned int irq;
 293         int i = 0, j = 0;
 294
 295         for (;;) {
 296                 struct resource *res;
 297
 298                 if (j >= MACIO_DEV_COUNT_IRQS)
 299                         break;
 300                 res = &dev->interrupt[j];
 301                 irq = irq_of_parse_and_map(np, i++);
 302                 if (!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.dev.of_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;
 325                 if (index >= MACIO_DEV_COUNT_RESOURCES)
 326                         break;
 327                 res = &dev->resource[index];
 328                 *res = r;
 329                 res->name = dev_name(&dev->ofdev.dev);
 330
 331                 if (macio_resource_quirks(np, res, index)) {
 332                         memset(res, 0, sizeof(struct resource));
 333                         continue;
 334                 }
 335                 /* Currently, we consider failure as harmless, this may
 336                  * change in the future, once I've found all the device
 337                  * tree bugs in older machines & worked around them
 338                  */
 339                 if (insert_resource(parent_res, res)) {
 340                         printk(KERN_WARNING "Can't request resource "
 341                                "%d for MacIO device %s\n",
 342                                index, dev_name(&dev->ofdev.dev));
 343                 }
 344         }
 345         dev->n_resources = index;
 346 }
 347
 348 /**
 349  * macio_add_one_device - Add one device from OF node to the device tree
 350  * @chip: pointer to the macio_chip holding the device
 351  * @np: pointer to the device node in the OF tree
 352  * @in_bay: set to 1 if device is part of a media-bay
 353  *
 354  * When media-bay is changed to hotswap drivers, this function will
 355  * be exposed to the bay driver some way...
 356  */
 357 static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
 358                                                struct device *parent,
 359                                                struct device_node *np,
 360                                                struct macio_dev *in_bay,
 361                                                struct resource *parent_res)
 362 {
 363         char name[MAX_NODE_NAME_SIZE + 1];
 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.dev.of_node = np;
 377         dev->ofdev.archdata.dma_mask = 0xffffffffUL;
 378         dev->ofdev.dev.dma_mask = &dev->ofdev.archdata.dma_mask;
 379         dev->ofdev.dev.coherent_dma_mask = dev->ofdev.archdata.dma_mask;
 380         dev->ofdev.dev.parent = parent;
 381         dev->ofdev.dev.bus = &macio_bus_type;
 382         dev->ofdev.dev.release = macio_release_dev;
 383         dev->ofdev.dev.dma_parms = &dev->dma_parms;
 384
 385         /* Standard DMA paremeters */
 386         dma_set_max_seg_size(&dev->ofdev.dev, 65536);
 387         dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff);
 388
 389 #ifdef CONFIG_PCI
 390         /* Set the DMA ops to the ones from the PCI device, this could be
 391          * fishy if we didn't know that on PowerMac it's always direct ops
 392          * or iommu ops that will work fine
 393          *
 394          * To get all the fields, copy all archdata
 395          */
 396         dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata;
 397         dev->ofdev.dev.dma_ops = chip->lbus.pdev->dev.dma_ops;
 398 #endif /* CONFIG_PCI */
 399
 400 #ifdef DEBUG
 401         printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
 402                dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
 403 #endif
 404
 405         /* MacIO itself has a different reg, we use it's PCI base */
 406         snprintf(name, sizeof(name), "%pOFn", np);
 407         if (np == chip->of_node) {
 408                 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
 409                              chip->lbus.index,
 410 #ifdef CONFIG_PCI
 411                         (unsigned int)pci_resource_start(chip->lbus.pdev, 0),
 412 #else
 413                         0, /* NuBus may want to do something better here */
 414 #endif
 415                         MAX_NODE_NAME_SIZE, name);
 416         } else {
 417                 reg = of_get_property(np, "reg", NULL);
 418                 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
 419                              chip->lbus.index,
 420                              reg ? *reg : 0, MAX_NODE_NAME_SIZE, name);
 421         }
 422
 423         /* Setup interrupts & resources */
 424         macio_setup_interrupts(dev);
 425         macio_setup_resources(dev, parent_res);
 426         macio_add_missing_resources(dev);
 427
 428         /* Register with core */
 429         if (of_device_register(&dev->ofdev) != 0) {
 430                 printk(KERN_DEBUG"macio: device registration error for %s!\n",
 431                        dev_name(&dev->ofdev.dev));
 432                 kfree(dev);
 433                 return NULL;
 434         }
 435
 436         return dev;
 437 }
 438
 439 static int macio_skip_device(struct device_node *np)
 440 {
 441         if (strncmp(np->name, "battery", 7) == 0)
 442                 return 1;
 443         if (strncmp(np->name, "escc-legacy", 11) == 0)
 444                 return 1;
 445         return 0;
 446 }
 447
 448 /**
 449  * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
 450  * @chip: pointer to the macio_chip holding the devices
 451  *
 452  * This function will do the job of extracting devices from the
 453  * Open Firmware device tree, build macio_dev structures and add
 454  * them to the Linux device tree.
 455  *
 456  * For now, childs of media-bay are added now as well. This will
 457  * change rsn though.
 458  */
 459 static void macio_pci_add_devices(struct macio_chip *chip)
 460 {
 461         struct device_node *np, *pnode;
 462         struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
 463         struct device *parent = NULL;
 464         struct resource *root_res = &iomem_resource;
 465
 466         /* Add a node for the macio bus itself */
 467 #ifdef CONFIG_PCI
 468         if (chip->lbus.pdev) {
 469                 parent = &chip->lbus.pdev->dev;
 470                 root_res = &chip->lbus.pdev->resource[0];
 471         }
 472 #endif
 473         pnode = of_node_get(chip->of_node);
 474         if (pnode == NULL)
 475                 return;
 476
 477         /* Add macio itself to hierarchy */
 478         rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
 479         if (rdev == NULL)
 480                 return;
 481         root_res = &rdev->resource[0];
 482
 483         /* First scan 1st level */
 484         for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
 485                 if (macio_skip_device(np))
 486                         continue;
 487                 of_node_get(np);
 488                 mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
 489                                             root_res);
 490                 if (mdev == NULL)
 491                         of_node_put(np);
 492                 else if (strncmp(np->name, "media-bay", 9) == 0)
 493                         mbdev = mdev;
 494                 else if (strncmp(np->name, "escc", 4) == 0)
 495                         sdev = mdev;
 496         }
 497
 498         /* Add media bay devices if any */
 499         if (mbdev) {
 500                 pnode = mbdev->ofdev.dev.of_node;
 501                 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
 502                         if (macio_skip_device(np))
 503                                 continue;
 504                         of_node_get(np);
 505                         if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
 506                                                  mbdev,  root_res) == NULL)
 507                                 of_node_put(np);
 508                 }
 509         }
 510
 511         /* Add serial ports if any */
 512         if (sdev) {
 513                 pnode = sdev->ofdev.dev.of_node;
 514                 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
 515                         if (macio_skip_device(np))
 516                                 continue;
 517                         of_node_get(np);
 518                         if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
 519                                                  NULL, root_res) == NULL)
 520                                 of_node_put(np);
 521                 }
 522         }
 523 }
 524
 525
 526 /**
 527  * macio_register_driver - Registers a new MacIO device driver
 528  * @drv: pointer to the driver definition structure
 529  */
 530 int macio_register_driver(struct macio_driver *drv)
 531 {
 532         /* initialize common driver fields */
 533         drv->driver.bus = &macio_bus_type;
 534
 535         /* register with core */
 536         return driver_register(&drv->driver);
 537 }
 538
 539 /**
 540  * macio_unregister_driver - Unregisters a new MacIO device driver
 541  * @drv: pointer to the driver definition structure
 542  */
 543 void macio_unregister_driver(struct macio_driver *drv)
 544 {
 545         driver_unregister(&drv->driver);
 546 }
 547
 548 /* Managed MacIO resources */
 549 struct macio_devres {
 550         u32     res_mask;
 551 };
 552
 553 static void maciom_release(struct device *gendev, void *res)
 554 {
 555         struct macio_dev *dev = to_macio_device(gendev);
 556         struct macio_devres *dr = res;
 557         int i, max;
 558
 559         max = min(dev->n_resources, 32);
 560         for (i = 0; i < max; i++) {
 561                 if (dr->res_mask & (1 << i))
 562                         macio_release_resource(dev, i);
 563         }
 564 }
 565
 566 int macio_enable_devres(struct macio_dev *dev)
 567 {
 568         struct macio_devres *dr;
 569
 570         dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
 571         if (!dr) {
 572                 dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL);
 573                 if (!dr)
 574                         return -ENOMEM;
 575         }
 576         return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL;
 577 }
 578
 579 static struct macio_devres * find_macio_dr(struct macio_dev *dev)
 580 {
 581         return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
 582 }
 583
 584 /**
 585  *      macio_request_resource - Request an MMIO resource
 586  *      @dev: pointer to the device holding the resource
 587  *      @resource_no: resource number to request
 588  *      @name: resource name
 589  *
 590  *      Mark  memory region number @resource_no associated with MacIO
 591  *      device @dev as being reserved by owner @name.  Do not access
 592  *      any address inside the memory regions unless this call returns
 593  *      successfully.
 594  *
 595  *      Returns 0 on success, or %EBUSY on error.  A warning
 596  *      message is also printed on failure.
 597  */
 598 int macio_request_resource(struct macio_dev *dev, int resource_no,
 599                            const char *name)
 600 {
 601         struct macio_devres *dr = find_macio_dr(dev);
 602
 603         if (macio_resource_len(dev, resource_no) == 0)
 604                 return 0;
 605
 606         if (!request_mem_region(macio_resource_start(dev, resource_no),
 607                                 macio_resource_len(dev, resource_no),
 608                                 name))
 609                 goto err_out;
 610
 611         if (dr && resource_no < 32)
 612                 dr->res_mask |= 1 << resource_no;
 613
 614         return 0;
 615
 616 err_out:
 617         printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
 618                 " for device %s\n",
 619                 resource_no,
 620                 macio_resource_len(dev, resource_no),
 621                 macio_resource_start(dev, resource_no),
 622                 dev_name(&dev->ofdev.dev));
 623         return -EBUSY;
 624 }
 625
 626 /**
 627  * macio_release_resource - Release an MMIO resource
 628  * @dev: pointer to the device holding the resource
 629  * @resource_no: resource number to release
 630  */
 631 void macio_release_resource(struct macio_dev *dev, int resource_no)
 632 {
 633         struct macio_devres *dr = find_macio_dr(dev);
 634
 635         if (macio_resource_len(dev, resource_no) == 0)
 636                 return;
 637         release_mem_region(macio_resource_start(dev, resource_no),
 638                            macio_resource_len(dev, resource_no));
 639         if (dr && resource_no < 32)
 640                 dr->res_mask &= ~(1 << resource_no);
 641 }
 642
 643 /**
 644  *      macio_request_resources - Reserve all memory resources
 645  *      @dev: MacIO device whose resources are to be reserved
 646  *      @name: Name to be associated with resource.
 647  *
 648  *      Mark all memory regions associated with MacIO device @dev as
 649  *      being reserved by owner @name.  Do not access any address inside
 650  *      the memory regions unless this call returns successfully.
 651  *
 652  *      Returns 0 on success, or %EBUSY on error.  A warning
 653  *      message is also printed on failure.
 654  */
 655 int macio_request_resources(struct macio_dev *dev, const char *name)
 656 {
 657         int i;
 658
 659         for (i = 0; i < dev->n_resources; i++)
 660                 if (macio_request_resource(dev, i, name))
 661                         goto err_out;
 662         return 0;
 663
 664 err_out:
 665         while(--i >= 0)
 666                 macio_release_resource(dev, i);
 667
 668         return -EBUSY;
 669 }
 670
 671 /**
 672  *      macio_release_resources - Release reserved memory resources
 673  *      @dev: MacIO device whose resources were previously reserved
 674  */
 675
 676 void macio_release_resources(struct macio_dev *dev)
 677 {
 678         int i;
 679
 680         for (i = 0; i < dev->n_resources; i++)
 681                 macio_release_resource(dev, i);
 682 }
 683
 684
 685 #ifdef CONFIG_PCI
 686
 687 static int macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 688 {
 689         struct device_node* np;
 690         struct macio_chip* chip;
 691
 692         if (ent->vendor != PCI_VENDOR_ID_APPLE)
 693                 return -ENODEV;
 694
 695         /* Note regarding refcounting: We assume pci_device_to_OF_node() is
 696          * ported to new OF APIs and returns a node with refcount incremented.
 697          */
 698         np = pci_device_to_OF_node(pdev);
 699         if (np == NULL)
 700                 return -ENODEV;
 701
 702         /* The above assumption is wrong !!!
 703          * fix that here for now until I fix the arch code
 704          */
 705         of_node_get(np);
 706
 707         /* We also assume that pmac_feature will have done a get() on nodes
 708          * stored in the macio chips array
 709          */
 710         chip = macio_find(np, macio_unknown);
 711         of_node_put(np);
 712         if (chip == NULL)
 713                 return -ENODEV;
 714
 715         /* XXX Need locking ??? */
 716         if (chip->lbus.pdev == NULL) {
 717                 chip->lbus.pdev = pdev;
 718                 chip->lbus.chip = chip;
 719                 pci_set_drvdata(pdev, &chip->lbus);
 720                 pci_set_master(pdev);
 721         }
 722
 723         printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
 724                 chip->name);
 725
 726         /*
 727          * HACK ALERT: The WallStreet PowerBook and some OHare based machines
 728          * have 2 macio ASICs. I must probe the "main" one first or IDE
 729          * ordering will be incorrect. So I put on "hold" the second one since
 730          * it seem to appear first on PCI
 731          */
 732         if (chip->type == macio_gatwick || chip->type == macio_ohareII)
 733                 if (macio_chips[0].lbus.pdev == NULL) {
 734                         macio_on_hold = chip;
 735                         return 0;
 736                 }
 737
 738         macio_pci_add_devices(chip);
 739         if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
 740                 macio_pci_add_devices(macio_on_hold);
 741                 macio_on_hold = NULL;
 742         }
 743
 744         return 0;
 745 }
 746
 747 static void macio_pci_remove(struct pci_dev* pdev)
 748 {
 749         panic("removing of macio-asic not supported !\n");
 750 }
 751
 752 /*
 753  * MacIO is matched against any Apple ID, it's probe() function
 754  * will then decide wether it applies or not
 755  */
 756 static const struct pci_device_id pci_ids[] = { {
 757         .vendor         = PCI_VENDOR_ID_APPLE,
 758         .device         = PCI_ANY_ID,
 759         .subvendor      = PCI_ANY_ID,
 760         .subdevice      = PCI_ANY_ID,
 761
 762         }, { /* end: all zeroes */ }
 763 };
 764 MODULE_DEVICE_TABLE (pci, pci_ids);
 765
 766 /* pci driver glue; this is a "new style" PCI driver module */
 767 static struct pci_driver macio_pci_driver = {
 768         .name           = (char *) "macio",
 769         .id_table       = pci_ids,
 770
 771         .probe          = macio_pci_probe,
 772         .remove         = macio_pci_remove,
 773 };
 774
 775 #endif /* CONFIG_PCI */
 776
 777 static int __init macio_module_init (void)
 778 {
 779 #ifdef CONFIG_PCI
 780         int rc;
 781
 782         rc = pci_register_driver(&macio_pci_driver);
 783         if (rc)
 784                 return rc;
 785 #endif /* CONFIG_PCI */
 786         return 0;
 787 }
 788
 789 module_init(macio_module_init);
 790
 791 EXPORT_SYMBOL(macio_register_driver);
 792 EXPORT_SYMBOL(macio_unregister_driver);
 793 EXPORT_SYMBOL(macio_dev_get);
 794 EXPORT_SYMBOL(macio_dev_put);
 795 EXPORT_SYMBOL(macio_request_resource);
 796 EXPORT_SYMBOL(macio_release_resource);
 797 EXPORT_SYMBOL(macio_request_resources);
 798 EXPORT_SYMBOL(macio_release_resources);
 799 EXPORT_SYMBOL(macio_enable_devres);
 800