drivers/macintosh/macio

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This source file includes following definitions.
macio_bus_match
macio_dev_get
macio_dev_put
macio_device_probe
macio_device_remove
macio_device_shutdown
macio_device_suspend
macio_device_resume
macio_bus_driver_init
macio_release_dev
macio_resource_quirks
macio_create_fixup_irq
macio_add_missing_resources
macio_setup_interrupts
macio_setup_resources
macio_add_one_device
macio_skip_device
macio_pci_add_devices
macio_register_driver
macio_unregister_driver
maciom_release
macio_enable_devres
find_macio_dr
macio_request_resource
macio_release_resource
macio_request_resources
macio_release_resources
macio_pci_probe
macio_pci_remove
macio_module_init
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Bus & driver management routines for devices within
   4  * a MacIO ASIC. Interface to new driver model mostly
   5  * stolen from the PCI version.
   6  * 
   7  *  Copyright (C) 2005 Ben. Herrenschmidt (benh@kernel.crashing.org)
   8  *
   9  * TODO:
  10  * 
  11  *  - Don't probe below media bay by default, but instead provide
  12  *    some hooks for media bay to dynamically add/remove it's own
  13  *    sub-devices.
  14  */
  15  
  16 #include <linux/string.h>
  17 #include <linux/kernel.h>
  18 #include <linux/pci.h>
  19 #include <linux/pci_ids.h>
  20 #include <linux/init.h>
  21 #include <linux/module.h>
  22 #include <linux/slab.h>
  23 #include <linux/of_address.h>
  24 #include <linux/of_irq.h>
  25 
  26 #include <asm/machdep.h>
  27 #include <asm/macio.h>
  28 #include <asm/pmac_feature.h>
  29 #include <asm/prom.h>
  30 
  31 #undef DEBUG
  32 
  33 #define MAX_NODE_NAME_SIZE (20 - 12)
  34 
  35 static struct macio_chip      *macio_on_hold;
  36 
  37 static int macio_bus_match(struct device *dev, struct device_driver *drv) 
  38 {
  39         const struct of_device_id * matches = drv->of_match_table;
  40 
  41         if (!matches) 
  42                 return 0;
  43 
  44         return of_match_device(matches, dev) != NULL;
  45 }
  46 
  47 struct macio_dev *macio_dev_get(struct macio_dev *dev)
  48 {
  49         struct device *tmp;
  50 
  51         if (!dev)
  52                 return NULL;
  53         tmp = get_device(&dev->ofdev.dev);
  54         if (tmp)
  55                 return to_macio_device(tmp);
  56         else
  57                 return NULL;
  58 }
  59 
  60 void macio_dev_put(struct macio_dev *dev)
  61 {
  62         if (dev)
  63                 put_device(&dev->ofdev.dev);
  64 }
  65 
  66 
  67 static int macio_device_probe(struct device *dev)
  68 {
  69         int error = -ENODEV;
  70         struct macio_driver *drv;
  71         struct macio_dev *macio_dev;
  72         const struct of_device_id *match;
  73 
  74         drv = to_macio_driver(dev->driver);
  75         macio_dev = to_macio_device(dev);
  76 
  77         if (!drv->probe)
  78                 return error;
  79 
  80         macio_dev_get(macio_dev);
  81 
  82         match = of_match_device(drv->driver.of_match_table, dev);
  83         if (match)
  84                 error = drv->probe(macio_dev, match);
  85         if (error)
  86                 macio_dev_put(macio_dev);
  87 
  88         return error;
  89 }
  90 
  91 static int macio_device_remove(struct device *dev)
  92 {
  93         struct macio_dev * macio_dev = to_macio_device(dev);
  94         struct macio_driver * drv = to_macio_driver(dev->driver);
  95 
  96         if (dev->driver && drv->remove)
  97                 drv->remove(macio_dev);
  98         macio_dev_put(macio_dev);
  99 
 100         return 0;
 101 }
 102 
 103 static void macio_device_shutdown(struct device *dev)
 104 {
 105         struct macio_dev * macio_dev = to_macio_device(dev);
 106         struct macio_driver * drv = to_macio_driver(dev->driver);
 107 
 108         if (dev->driver && drv->shutdown)
 109                 drv->shutdown(macio_dev);
 110 }
 111 
 112 static int macio_device_suspend(struct device *dev, pm_message_t state)
 113 {
 114         struct macio_dev * macio_dev = to_macio_device(dev);
 115         struct macio_driver * drv = to_macio_driver(dev->driver);
 116 
 117         if (dev->driver && drv->suspend)
 118                 return drv->suspend(macio_dev, state);
 119         return 0;
 120 }
 121 
 122 static int macio_device_resume(struct device * dev)
 123 {
 124         struct macio_dev * macio_dev = to_macio_device(dev);
 125         struct macio_driver * drv = to_macio_driver(dev->driver);
 126 
 127         if (dev->driver && drv->resume)
 128                 return drv->resume(macio_dev);
 129         return 0;
 130 }
 131 
 132 extern const struct attribute_group *macio_dev_groups[];
 133 
 134 struct bus_type macio_bus_type = {
 135        .name    = "macio",
 136        .match   = macio_bus_match,
 137        .uevent = of_device_uevent_modalias,
 138        .probe   = macio_device_probe,
 139        .remove  = macio_device_remove,
 140        .shutdown = macio_device_shutdown,
 141        .suspend = macio_device_suspend,
 142        .resume  = macio_device_resume,
 143        .dev_groups = macio_dev_groups,
 144 };
 145 
 146 static int __init macio_bus_driver_init(void)
 147 {
 148         return bus_register(&macio_bus_type);
 149 }
 150 
 151 postcore_initcall(macio_bus_driver_init);
 152 
 153 
 154 /**
 155  * macio_release_dev - free a macio device structure when all users of it are
 156  * finished.
 157  * @dev: device that's been disconnected
 158  *
 159  * Will be called only by the device core when all users of this macio device
 160  * are done. This currently means never as we don't hot remove any macio
 161  * device yet, though that will happen with mediabay based devices in a later
 162  * implementation.
 163  */
 164 static void macio_release_dev(struct device *dev)
 165 {
 166         struct macio_dev *mdev;
 167 
 168         mdev = to_macio_device(dev);
 169         kfree(mdev);
 170 }
 171 
 172 /**
 173  * macio_resource_quirks - tweak or skip some resources for a device
 174  * @np: pointer to the device node
 175  * @res: resulting resource
 176  * @index: index of resource in node
 177  *
 178  * If this routine returns non-null, then the resource is completely
 179  * skipped.
 180  */
 181 static int macio_resource_quirks(struct device_node *np, struct resource *res,
 182                                  int index)
 183 {
 184         /* Only quirks for memory resources for now */
 185         if ((res->flags & IORESOURCE_MEM) == 0)
 186                 return 0;
 187 
 188         /* Grand Central has too large resource 0 on some machines */
 189         if (index == 0 && of_node_name_eq(np, "gc"))
 190                 res->end = res->start + 0x1ffff;
 191 
 192         /* Airport has bogus resource 2 */
 193         if (index >= 2 && of_node_name_eq(np, "radio"))
 194                 return 1;
 195 
 196 #ifndef CONFIG_PPC64
 197         /* DBDMAs may have bogus sizes */
 198         if ((res->start & 0x0001f000) == 0x00008000)
 199                 res->end = res->start + 0xff;
 200 #endif /* CONFIG_PPC64 */
 201 
 202         /* ESCC parent eats child resources. We could have added a
 203          * level of hierarchy, but I don't really feel the need
 204          * for it
 205          */
 206         if (of_node_name_eq(np, "escc"))
 207                 return 1;
 208 
 209         /* ESCC has bogus resources >= 3 */
 210         if (index >= 3 && (of_node_name_eq(np, "ch-a") ||
 211                            of_node_name_eq(np, "ch-b")))
 212                 return 1;
 213 
 214         /* Media bay has too many resources, keep only first one */
 215         if (index > 0 && of_node_name_eq(np, "media-bay"))
 216                 return 1;
 217 
 218         /* Some older IDE resources have bogus sizes */
 219         if (of_node_name_eq(np, "IDE") || of_node_name_eq(np, "ATA") ||
 220             of_node_is_type(np, "ide") || of_node_is_type(np, "ata")) {
 221                 if (index == 0 && (res->end - res->start) > 0xfff)
 222                         res->end = res->start + 0xfff;
 223                 if (index == 1 && (res->end - res->start) > 0xff)
 224                         res->end = res->start + 0xff;
 225         }
 226         return 0;
 227 }
 228 
 229 static void macio_create_fixup_irq(struct macio_dev *dev, int index,
 230                                    unsigned int line)
 231 {
 232         unsigned int irq;
 233 
 234         irq = irq_create_mapping(NULL, line);
 235         if (!irq) {
 236                 dev->interrupt[index].start = irq;
 237                 dev->interrupt[index].flags = IORESOURCE_IRQ;
 238                 dev->interrupt[index].name = dev_name(&dev->ofdev.dev);
 239         }
 240         if (dev->n_interrupts <= index)
 241                 dev->n_interrupts = index + 1;
 242 }
 243 
 244 static void macio_add_missing_resources(struct macio_dev *dev)
 245 {
 246         struct device_node *np = dev->ofdev.dev.of_node;
 247         unsigned int irq_base;
 248 
 249         /* Gatwick has some missing interrupts on child nodes */
 250         if (dev->bus->chip->type != macio_gatwick)
 251                 return;
 252 
 253         /* irq_base is always 64 on gatwick. I have no cleaner way to get
 254          * that value from here at this point
 255          */
 256         irq_base = 64;
 257 
 258         /* Fix SCC */
 259         if (of_node_name_eq(np, "ch-a")) {
 260                 macio_create_fixup_irq(dev, 0, 15 + irq_base);
 261                 macio_create_fixup_irq(dev, 1,  4 + irq_base);
 262                 macio_create_fixup_irq(dev, 2,  5 + irq_base);
 263                 printk(KERN_INFO "macio: fixed SCC irqs on gatwick\n");
 264         }
 265 
 266         /* Fix media-bay */
 267         if (of_node_name_eq(np, "media-bay")) {
 268                 macio_create_fixup_irq(dev, 0, 29 + irq_base);
 269                 printk(KERN_INFO "macio: fixed media-bay irq on gatwick\n");
 270         }
 271 
 272         /* Fix left media bay childs */
 273         if (dev->media_bay != NULL && of_node_name_eq(np, "floppy")) {
 274                 macio_create_fixup_irq(dev, 0, 19 + irq_base);
 275                 macio_create_fixup_irq(dev, 1,  1 + irq_base);
 276                 printk(KERN_INFO "macio: fixed left floppy irqs\n");
 277         }
 278         if (dev->media_bay != NULL && of_node_name_eq(np, "ata4")) {
 279                 macio_create_fixup_irq(dev, 0, 14 + irq_base);
 280                 macio_create_fixup_irq(dev, 0,  3 + irq_base);
 281                 printk(KERN_INFO "macio: fixed left ide irqs\n");
 282         }
 283 }
 284 
 285 static void macio_setup_interrupts(struct macio_dev *dev)
 286 {
 287         struct device_node *np = dev->ofdev.dev.of_node;
 288         unsigned int irq;
 289         int i = 0, j = 0;
 290 
 291         for (;;) {
 292                 struct resource *res;
 293 
 294                 if (j >= MACIO_DEV_COUNT_IRQS)
 295                         break;
 296                 res = &dev->interrupt[j];
 297                 irq = irq_of_parse_and_map(np, i++);
 298                 if (!irq)
 299                         break;
 300                 res->start = irq;
 301                 res->flags = IORESOURCE_IRQ;
 302                 res->name = dev_name(&dev->ofdev.dev);
 303                 if (macio_resource_quirks(np, res, i - 1)) {
 304                         memset(res, 0, sizeof(struct resource));
 305                         continue;
 306                 } else
 307                         j++;
 308         }
 309         dev->n_interrupts = j;
 310 }
 311 
 312 static void macio_setup_resources(struct macio_dev *dev,
 313                                   struct resource *parent_res)
 314 {
 315         struct device_node *np = dev->ofdev.dev.of_node;
 316         struct resource r;
 317         int index;
 318 
 319         for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {
 320                 struct resource *res;
 321                 if (index >= MACIO_DEV_COUNT_RESOURCES)
 322                         break;
 323                 res = &dev->resource[index];
 324                 *res = r;
 325                 res->name = dev_name(&dev->ofdev.dev);
 326 
 327                 if (macio_resource_quirks(np, res, index)) {
 328                         memset(res, 0, sizeof(struct resource));
 329                         continue;
 330                 }
 331                 /* Currently, we consider failure as harmless, this may
 332                  * change in the future, once I've found all the device
 333                  * tree bugs in older machines & worked around them
 334                  */
 335                 if (insert_resource(parent_res, res)) {
 336                         printk(KERN_WARNING "Can't request resource "
 337                                "%d for MacIO device %s\n",
 338                                index, dev_name(&dev->ofdev.dev));
 339                 }
 340         }
 341         dev->n_resources = index;
 342 }
 343 
 344 /**
 345  * macio_add_one_device - Add one device from OF node to the device tree
 346  * @chip: pointer to the macio_chip holding the device
 347  * @np: pointer to the device node in the OF tree
 348  * @in_bay: set to 1 if device is part of a media-bay
 349  *
 350  * When media-bay is changed to hotswap drivers, this function will
 351  * be exposed to the bay driver some way...
 352  */
 353 static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
 354                                                struct device *parent,
 355                                                struct device_node *np,
 356                                                struct macio_dev *in_bay,
 357                                                struct resource *parent_res)
 358 {
 359         char name[MAX_NODE_NAME_SIZE + 1];
 360         struct macio_dev *dev;
 361         const u32 *reg;
 362 
 363         if (np == NULL)
 364                 return NULL;
 365 
 366         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 367         if (!dev)
 368                 return NULL;
 369 
 370         dev->bus = &chip->lbus;
 371         dev->media_bay = in_bay;
 372         dev->ofdev.dev.of_node = np;
 373         dev->ofdev.archdata.dma_mask = 0xffffffffUL;
 374         dev->ofdev.dev.dma_mask = &dev->ofdev.archdata.dma_mask;
 375         dev->ofdev.dev.coherent_dma_mask = dev->ofdev.archdata.dma_mask;
 376         dev->ofdev.dev.parent = parent;
 377         dev->ofdev.dev.bus = &macio_bus_type;
 378         dev->ofdev.dev.release = macio_release_dev;
 379         dev->ofdev.dev.dma_parms = &dev->dma_parms;
 380 
 381         /* Standard DMA paremeters */
 382         dma_set_max_seg_size(&dev->ofdev.dev, 65536);
 383         dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff);
 384 
 385 #ifdef CONFIG_PCI
 386         /* Set the DMA ops to the ones from the PCI device, this could be
 387          * fishy if we didn't know that on PowerMac it's always direct ops
 388          * or iommu ops that will work fine
 389          *
 390          * To get all the fields, copy all archdata
 391          */
 392         dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata;
 393         dev->ofdev.dev.dma_ops = chip->lbus.pdev->dev.dma_ops;
 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         snprintf(name, sizeof(name), "%pOFn", np);
 403         if (np == chip->of_node) {
 404                 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
 405                              chip->lbus.index,
 406 #ifdef CONFIG_PCI
 407                         (unsigned int)pci_resource_start(chip->lbus.pdev, 0),
 408 #else
 409                         0, /* NuBus may want to do something better here */
 410 #endif
 411                         MAX_NODE_NAME_SIZE, name);
 412         } else {
 413                 reg = of_get_property(np, "reg", NULL);
 414                 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
 415                              chip->lbus.index,
 416                              reg ? *reg : 0, MAX_NODE_NAME_SIZE, name);
 417         }
 418 
 419         /* Setup interrupts & resources */
 420         macio_setup_interrupts(dev);
 421         macio_setup_resources(dev, parent_res);
 422         macio_add_missing_resources(dev);
 423 
 424         /* Register with core */
 425         if (of_device_register(&dev->ofdev) != 0) {
 426                 printk(KERN_DEBUG"macio: device registration error for %s!\n",
 427                        dev_name(&dev->ofdev.dev));
 428                 kfree(dev);
 429                 return NULL;
 430         }
 431 
 432         return dev;
 433 }
 434 
 435 static int macio_skip_device(struct device_node *np)
 436 {
 437         return of_node_name_prefix(np, "battery") ||
 438                of_node_name_prefix(np, "escc-legacy");
 439 }
 440 
 441 /**
 442  * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
 443  * @chip: pointer to the macio_chip holding the devices
 444  * 
 445  * This function will do the job of extracting devices from the
 446  * Open Firmware device tree, build macio_dev structures and add
 447  * them to the Linux device tree.
 448  * 
 449  * For now, childs of media-bay are added now as well. This will
 450  * change rsn though.
 451  */
 452 static void macio_pci_add_devices(struct macio_chip *chip)
 453 {
 454         struct device_node *np, *pnode;
 455         struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
 456         struct device *parent = NULL;
 457         struct resource *root_res = &iomem_resource;
 458         
 459         /* Add a node for the macio bus itself */
 460 #ifdef CONFIG_PCI
 461         if (chip->lbus.pdev) {
 462                 parent = &chip->lbus.pdev->dev;
 463                 root_res = &chip->lbus.pdev->resource[0];
 464         }
 465 #endif
 466         pnode = of_node_get(chip->of_node);
 467         if (pnode == NULL)
 468                 return;
 469 
 470         /* Add macio itself to hierarchy */
 471         rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
 472         if (rdev == NULL)
 473                 return;
 474         root_res = &rdev->resource[0];
 475 
 476         /* First scan 1st level */
 477         for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
 478                 if (macio_skip_device(np))
 479                         continue;
 480                 of_node_get(np);
 481                 mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
 482                                             root_res);
 483                 if (mdev == NULL)
 484                         of_node_put(np);
 485                 else if (of_node_name_prefix(np, "media-bay"))
 486                         mbdev = mdev;
 487                 else if (of_node_name_prefix(np, "escc"))
 488                         sdev = mdev;
 489         }
 490 
 491         /* Add media bay devices if any */
 492         if (mbdev) {
 493                 pnode = mbdev->ofdev.dev.of_node;
 494                 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
 495                         if (macio_skip_device(np))
 496                                 continue;
 497                         of_node_get(np);
 498                         if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
 499                                                  mbdev,  root_res) == NULL)
 500                                 of_node_put(np);
 501                 }
 502         }
 503 
 504         /* Add serial ports if any */
 505         if (sdev) {
 506                 pnode = sdev->ofdev.dev.of_node;
 507                 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
 508                         if (macio_skip_device(np))
 509                                 continue;
 510                         of_node_get(np);
 511                         if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
 512                                                  NULL, root_res) == NULL)
 513                                 of_node_put(np);
 514                 }
 515         }
 516 }
 517 
 518 
 519 /**
 520  * macio_register_driver - Registers a new MacIO device driver
 521  * @drv: pointer to the driver definition structure
 522  */
 523 int macio_register_driver(struct macio_driver *drv)
 524 {
 525         /* initialize common driver fields */
 526         drv->driver.bus = &macio_bus_type;
 527 
 528         /* register with core */
 529         return driver_register(&drv->driver);
 530 }
 531 
 532 /**
 533  * macio_unregister_driver - Unregisters a new MacIO device driver
 534  * @drv: pointer to the driver definition structure
 535  */
 536 void macio_unregister_driver(struct macio_driver *drv)
 537 {
 538         driver_unregister(&drv->driver);
 539 }
 540 
 541 /* Managed MacIO resources */
 542 struct macio_devres {
 543         u32     res_mask;
 544 };
 545 
 546 static void maciom_release(struct device *gendev, void *res)
 547 {
 548         struct macio_dev *dev = to_macio_device(gendev);
 549         struct macio_devres *dr = res;
 550         int i, max;
 551 
 552         max = min(dev->n_resources, 32);
 553         for (i = 0; i < max; i++) {
 554                 if (dr->res_mask & (1 << i))
 555                         macio_release_resource(dev, i);
 556         }
 557 }
 558 
 559 int macio_enable_devres(struct macio_dev *dev)
 560 {
 561         struct macio_devres *dr;
 562 
 563         dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
 564         if (!dr) {
 565                 dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL);
 566                 if (!dr)
 567                         return -ENOMEM;
 568         }
 569         return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL;
 570 }
 571 
 572 static struct macio_devres * find_macio_dr(struct macio_dev *dev)
 573 {
 574         return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
 575 }
 576 
 577 /**
 578  *      macio_request_resource - Request an MMIO resource
 579  *      @dev: pointer to the device holding the resource
 580  *      @resource_no: resource number to request
 581  *      @name: resource name
 582  *
 583  *      Mark  memory region number @resource_no associated with MacIO
 584  *      device @dev as being reserved by owner @name.  Do not access
 585  *      any address inside the memory regions unless this call returns
 586  *      successfully.
 587  *
 588  *      Returns 0 on success, or %EBUSY on error.  A warning
 589  *      message is also printed on failure.
 590  */
 591 int macio_request_resource(struct macio_dev *dev, int resource_no,
 592                            const char *name)
 593 {
 594         struct macio_devres *dr = find_macio_dr(dev);
 595 
 596         if (macio_resource_len(dev, resource_no) == 0)
 597                 return 0;
 598                 
 599         if (!request_mem_region(macio_resource_start(dev, resource_no),
 600                                 macio_resource_len(dev, resource_no),
 601                                 name))
 602                 goto err_out;
 603 
 604         if (dr && resource_no < 32)
 605                 dr->res_mask |= 1 << resource_no;
 606         
 607         return 0;
 608 
 609 err_out:
 610         printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
 611                 " for device %s\n",
 612                 resource_no,
 613                 macio_resource_len(dev, resource_no),
 614                 macio_resource_start(dev, resource_no),
 615                 dev_name(&dev->ofdev.dev));
 616         return -EBUSY;
 617 }
 618 
 619 /**
 620  * macio_release_resource - Release an MMIO resource
 621  * @dev: pointer to the device holding the resource
 622  * @resource_no: resource number to release
 623  */
 624 void macio_release_resource(struct macio_dev *dev, int resource_no)
 625 {
 626         struct macio_devres *dr = find_macio_dr(dev);
 627 
 628         if (macio_resource_len(dev, resource_no) == 0)
 629                 return;
 630         release_mem_region(macio_resource_start(dev, resource_no),
 631                            macio_resource_len(dev, resource_no));
 632         if (dr && resource_no < 32)
 633                 dr->res_mask &= ~(1 << resource_no);
 634 }
 635 
 636 /**
 637  *      macio_request_resources - Reserve all memory resources
 638  *      @dev: MacIO device whose resources are to be reserved
 639  *      @name: Name to be associated with resource.
 640  *
 641  *      Mark all memory regions associated with MacIO device @dev as
 642  *      being reserved by owner @name.  Do not access any address inside
 643  *      the memory regions unless this call returns successfully.
 644  *
 645  *      Returns 0 on success, or %EBUSY on error.  A warning
 646  *      message is also printed on failure.
 647  */
 648 int macio_request_resources(struct macio_dev *dev, const char *name)
 649 {
 650         int i;
 651         
 652         for (i = 0; i < dev->n_resources; i++)
 653                 if (macio_request_resource(dev, i, name))
 654                         goto err_out;
 655         return 0;
 656 
 657 err_out:
 658         while(--i >= 0)
 659                 macio_release_resource(dev, i);
 660                 
 661         return -EBUSY;
 662 }
 663 
 664 /**
 665  *      macio_release_resources - Release reserved memory resources
 666  *      @dev: MacIO device whose resources were previously reserved
 667  */
 668 
 669 void macio_release_resources(struct macio_dev *dev)
 670 {
 671         int i;
 672         
 673         for (i = 0; i < dev->n_resources; i++)
 674                 macio_release_resource(dev, i);
 675 }
 676 
 677 
 678 #ifdef CONFIG_PCI
 679 
 680 static int macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 681 {
 682         struct device_node* np;
 683         struct macio_chip* chip;
 684         
 685         if (ent->vendor != PCI_VENDOR_ID_APPLE)
 686                 return -ENODEV;
 687 
 688         /* Note regarding refcounting: We assume pci_device_to_OF_node() is
 689          * ported to new OF APIs and returns a node with refcount incremented.
 690          */
 691         np = pci_device_to_OF_node(pdev);
 692         if (np == NULL)
 693                 return -ENODEV;
 694 
 695         /* The above assumption is wrong !!!
 696          * fix that here for now until I fix the arch code
 697          */
 698         of_node_get(np);
 699 
 700         /* We also assume that pmac_feature will have done a get() on nodes
 701          * stored in the macio chips array
 702          */
 703         chip = macio_find(np, macio_unknown);
 704         of_node_put(np);
 705         if (chip == NULL)
 706                 return -ENODEV;
 707 
 708         /* XXX Need locking ??? */
 709         if (chip->lbus.pdev == NULL) {
 710                 chip->lbus.pdev = pdev;
 711                 chip->lbus.chip = chip;
 712                 pci_set_drvdata(pdev, &chip->lbus);
 713                 pci_set_master(pdev);
 714         }
 715 
 716         printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
 717                 chip->name);
 718 
 719         /*
 720          * HACK ALERT: The WallStreet PowerBook and some OHare based machines
 721          * have 2 macio ASICs. I must probe the "main" one first or IDE
 722          * ordering will be incorrect. So I put on "hold" the second one since
 723          * it seem to appear first on PCI
 724          */
 725         if (chip->type == macio_gatwick || chip->type == macio_ohareII)
 726                 if (macio_chips[0].lbus.pdev == NULL) {
 727                         macio_on_hold = chip;
 728                         return 0;
 729                 }
 730 
 731         macio_pci_add_devices(chip);
 732         if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
 733                 macio_pci_add_devices(macio_on_hold);
 734                 macio_on_hold = NULL;
 735         }
 736 
 737         return 0;
 738 }
 739 
 740 static void macio_pci_remove(struct pci_dev* pdev)
 741 {
 742         panic("removing of macio-asic not supported !\n");
 743 }
 744 
 745 /*
 746  * MacIO is matched against any Apple ID, it's probe() function
 747  * will then decide wether it applies or not
 748  */
 749 static const struct pci_device_id pci_ids[] = { {
 750         .vendor         = PCI_VENDOR_ID_APPLE,
 751         .device         = PCI_ANY_ID,
 752         .subvendor      = PCI_ANY_ID,
 753         .subdevice      = PCI_ANY_ID,
 754 
 755         }, { /* end: all zeroes */ }
 756 };
 757 MODULE_DEVICE_TABLE (pci, pci_ids);
 758 
 759 /* pci driver glue; this is a "new style" PCI driver module */
 760 static struct pci_driver macio_pci_driver = {
 761         .name           = (char *) "macio",
 762         .id_table       = pci_ids,
 763 
 764         .probe          = macio_pci_probe,
 765         .remove         = macio_pci_remove,
 766 };
 767 
 768 #endif /* CONFIG_PCI */
 769 
 770 static int __init macio_module_init (void) 
 771 {
 772 #ifdef CONFIG_PCI
 773         int rc;
 774 
 775         rc = pci_register_driver(&macio_pci_driver);
 776         if (rc)
 777                 return rc;
 778 #endif /* CONFIG_PCI */
 779         return 0;
 780 }
 781 
 782 module_init(macio_module_init);
 783 
 784 EXPORT_SYMBOL(macio_register_driver);
 785 EXPORT_SYMBOL(macio_unregister_driver);
 786 EXPORT_SYMBOL(macio_dev_get);
 787 EXPORT_SYMBOL(macio_dev_put);
 788 EXPORT_SYMBOL(macio_request_resource);
 789 EXPORT_SYMBOL(macio_release_resource);
 790 EXPORT_SYMBOL(macio_request_resources);
 791 EXPORT_SYMBOL(macio_release_resources);
 792 EXPORT_SYMBOL(macio_enable_devres);
 793
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/macintosh/macio_asic.c

DEFINITIONS
