arch/sparc/kernel/of_device_64.c

   1 #include <linux/string.h>
   2 #include <linux/kernel.h>
   3 #include <linux/of.h>
   4 #include <linux/init.h>
   5 #include <linux/module.h>
   6 #include <linux/mod_devicetable.h>
   7 #include <linux/slab.h>
   8 #include <linux/errno.h>
   9 #include <linux/irq.h>
  10 #include <linux/of_device.h>
  11 #include <linux/of_platform.h>
  12
  13 void __iomem *of_ioremap(struct resource *res, unsigned long offset, unsigned long size, char *name)
  14 {
  15         unsigned long ret = res->start + offset;
  16         struct resource *r;
  17
  18         if (res->flags & IORESOURCE_MEM)
  19                 r = request_mem_region(ret, size, name);
  20         else
  21                 r = request_region(ret, size, name);
  22         if (!r)
  23                 ret = 0;
  24
  25         return (void __iomem *) ret;
  26 }
  27 EXPORT_SYMBOL(of_ioremap);
  28
  29 void of_iounmap(struct resource *res, void __iomem *base, unsigned long size)
  30 {
  31         if (res->flags & IORESOURCE_MEM)
  32                 release_mem_region((unsigned long) base, size);
  33         else
  34                 release_region((unsigned long) base, size);
  35 }
  36 EXPORT_SYMBOL(of_iounmap);
  37
  38 static int node_match(struct device *dev, void *data)
  39 {
  40         struct of_device *op = to_of_device(dev);
  41         struct device_node *dp = data;
  42
  43         return (op->node == dp);
  44 }
  45
  46 struct of_device *of_find_device_by_node(struct device_node *dp)
  47 {
  48         struct device *dev = bus_find_device(&of_platform_bus_type, NULL,
  49                                              dp, node_match);
  50
  51         if (dev)
  52                 return to_of_device(dev);
  53
  54         return NULL;
  55 }
  56 EXPORT_SYMBOL(of_find_device_by_node);
  57
  58 unsigned int irq_of_parse_and_map(struct device_node *node, int index)
  59 {
  60         struct of_device *op = of_find_device_by_node(node);
  61
  62         if (!op || index >= op->num_irqs)
  63                 return 0;
  64
  65         return op->irqs[index];
  66 }
  67 EXPORT_SYMBOL(irq_of_parse_and_map);
  68
  69 /* Take the archdata values for IOMMU, STC, and HOSTDATA found in
  70  * BUS and propagate to all child of_device objects.
  71  */
  72 void of_propagate_archdata(struct of_device *bus)
  73 {
  74         struct dev_archdata *bus_sd = &bus->dev.archdata;
  75         struct device_node *bus_dp = bus->node;
  76         struct device_node *dp;
  77
  78         for (dp = bus_dp->child; dp; dp = dp->sibling) {
  79                 struct of_device *op = of_find_device_by_node(dp);
  80
  81                 op->dev.archdata.iommu = bus_sd->iommu;
  82                 op->dev.archdata.stc = bus_sd->stc;
  83                 op->dev.archdata.host_controller = bus_sd->host_controller;
  84                 op->dev.archdata.numa_node = bus_sd->numa_node;
  85
  86                 if (dp->child)
  87                         of_propagate_archdata(op);
  88         }
  89 }
  90
  91 struct bus_type of_platform_bus_type;
  92 EXPORT_SYMBOL(of_platform_bus_type);
  93
  94 static inline u64 of_read_addr(const u32 *cell, int size)
  95 {
  96         u64 r = 0;
  97         while (size--)
  98                 r = (r << 32) | *(cell++);
  99         return r;
 100 }
 101
 102 static void get_cells(struct device_node *dp, int *addrc, int *sizec)
 103 {
 104         if (addrc)
 105                 *addrc = of_n_addr_cells(dp);
 106         if (sizec)
 107                 *sizec = of_n_size_cells(dp);
 108 }
 109
 110 /* Max address size we deal with */
 111 #define OF_MAX_ADDR_CELLS       4
 112
 113 struct of_bus {
 114         const char      *name;
 115         const char      *addr_prop_name;
 116         int             (*match)(struct device_node *parent);
 117         void            (*count_cells)(struct device_node *child,
 118                                        int *addrc, int *sizec);
 119         int             (*map)(u32 *addr, const u32 *range,
 120                                int na, int ns, int pna);
 121         unsigned long   (*get_flags)(const u32 *addr, unsigned long);
 122 };
 123
 124 /*
 125  * Default translator (generic bus)
 126  */
 127
 128 static void of_bus_default_count_cells(struct device_node *dev,
 129                                        int *addrc, int *sizec)
 130 {
 131         get_cells(dev, addrc, sizec);
 132 }
 133
 134 /* Make sure the least significant 64-bits are in-range.  Even
 135  * for 3 or 4 cell values it is a good enough approximation.
 136  */
 137 static int of_out_of_range(const u32 *addr, const u32 *base,
 138                            const u32 *size, int na, int ns)
 139 {
 140         u64 a = of_read_addr(addr, na);
 141         u64 b = of_read_addr(base, na);
 142
 143         if (a < b)
 144                 return 1;
 145
 146         b += of_read_addr(size, ns);
 147         if (a >= b)
 148                 return 1;
 149
 150         return 0;
 151 }
 152
 153 static int of_bus_default_map(u32 *addr, const u32 *range,
 154                               int na, int ns, int pna)
 155 {
 156         u32 result[OF_MAX_ADDR_CELLS];
 157         int i;
 158
 159         if (ns > 2) {
 160                 printk("of_device: Cannot handle size cells (%d) > 2.", ns);
 161                 return -EINVAL;
 162         }
 163
 164         if (of_out_of_range(addr, range, range + na + pna, na, ns))
 165                 return -EINVAL;
 166
 167         /* Start with the parent range base.  */
 168         memcpy(result, range + na, pna * 4);
 169
 170         /* Add in the child address offset.  */
 171         for (i = 0; i < na; i++)
 172                 result[pna - 1 - i] +=
 173                         (addr[na - 1 - i] -
 174                          range[na - 1 - i]);
 175
 176         memcpy(addr, result, pna * 4);
 177
 178         return 0;
 179 }
 180
 181 static unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags)
 182 {
 183         if (flags)
 184                 return flags;
 185         return IORESOURCE_MEM;
 186 }
 187
 188 /*
 189  * PCI bus specific translator
 190  */
 191
 192 static int of_bus_pci_match(struct device_node *np)
 193 {
 194         if (!strcmp(np->name, "pci")) {
 195                 const char *model = of_get_property(np, "model", NULL);
 196
 197                 if (model && !strcmp(model, "SUNW,simba"))
 198                         return 0;
 199
 200                 /* Do not do PCI specific frobbing if the
 201                  * PCI bridge lacks a ranges property.  We
 202                  * want to pass it through up to the next
 203                  * parent as-is, not with the PCI translate
 204                  * method which chops off the top address cell.
 205                  */
 206                 if (!of_find_property(np, "ranges", NULL))
 207                         return 0;
 208
 209                 return 1;
 210         }
 211
 212         return 0;
 213 }
 214
 215 static int of_bus_simba_match(struct device_node *np)
 216 {
 217         const char *model = of_get_property(np, "model", NULL);
 218
 219         if (model && !strcmp(model, "SUNW,simba"))
 220                 return 1;
 221
 222         /* Treat PCI busses lacking ranges property just like
 223          * simba.
 224          */
 225         if (!strcmp(np->name, "pci")) {
 226                 if (!of_find_property(np, "ranges", NULL))
 227                         return 1;
 228         }
 229
 230         return 0;
 231 }
 232
 233 static int of_bus_simba_map(u32 *addr, const u32 *range,
 234                             int na, int ns, int pna)
 235 {
 236         return 0;
 237 }
 238
 239 static void of_bus_pci_count_cells(struct device_node *np,
 240                                    int *addrc, int *sizec)
 241 {
 242         if (addrc)
 243                 *addrc = 3;
 244         if (sizec)
 245                 *sizec = 2;
 246 }
 247
 248 static int of_bus_pci_map(u32 *addr, const u32 *range,
 249                           int na, int ns, int pna)
 250 {
 251         u32 result[OF_MAX_ADDR_CELLS];
 252         int i;
 253
 254         /* Check address type match */
 255         if ((addr[0] ^ range[0]) & 0x03000000)
 256                 return -EINVAL;
 257
 258         if (of_out_of_range(addr + 1, range + 1, range + na + pna,
 259                             na - 1, ns))
 260                 return -EINVAL;
 261
 262         /* Start with the parent range base.  */
 263         memcpy(result, range + na, pna * 4);
 264
 265         /* Add in the child address offset, skipping high cell.  */
 266         for (i = 0; i < na - 1; i++)
 267                 result[pna - 1 - i] +=
 268                         (addr[na - 1 - i] -
 269                          range[na - 1 - i]);
 270
 271         memcpy(addr, result, pna * 4);
 272
 273         return 0;
 274 }
 275
 276 static unsigned long of_bus_pci_get_flags(const u32 *addr, unsigned long flags)
 277 {
 278         u32 w = addr[0];
 279
 280         /* For PCI, we override whatever child busses may have used.  */
 281         flags = 0;
 282         switch((w >> 24) & 0x03) {
 283         case 0x01:
 284                 flags |= IORESOURCE_IO;
 285                 break;
 286
 287         case 0x02: /* 32 bits */
 288         case 0x03: /* 64 bits */
 289                 flags |= IORESOURCE_MEM;
 290                 break;
 291         }
 292         if (w & 0x40000000)
 293                 flags |= IORESOURCE_PREFETCH;
 294         return flags;
 295 }
 296
 297 /*
 298  * SBUS bus specific translator
 299  */
 300
 301 static int of_bus_sbus_match(struct device_node *np)
 302 {
 303         struct device_node *dp = np;
 304
 305         while (dp) {
 306                 if (!strcmp(dp->name, "sbus") ||
 307                     !strcmp(dp->name, "sbi"))
 308                         return 1;
 309
 310                 /* Have a look at use_1to1_mapping().  We're trying
 311                  * to match SBUS if that's the top-level bus and we
 312                  * don't have some intervening real bus that provides
 313                  * ranges based translations.
 314                  */
 315                 if (of_find_property(dp, "ranges", NULL) != NULL)
 316                         break;
 317
 318                 dp = dp->parent;
 319         }
 320
 321         return 0;
 322 }
 323
 324 static void of_bus_sbus_count_cells(struct device_node *child,
 325                                    int *addrc, int *sizec)
 326 {
 327         if (addrc)
 328                 *addrc = 2;
 329         if (sizec)
 330                 *sizec = 1;
 331 }
 332
 333 /*
 334  * FHC/Central bus specific translator.
 335  *
 336  * This is just needed to hard-code the address and size cell
 337  * counts.  'fhc' and 'central' nodes lack the #address-cells and
 338  * #size-cells properties, and if you walk to the root on such
 339  * Enterprise boxes all you'll get is a #size-cells of 2 which is
 340  * not what we want to use.
 341  */
 342 static int of_bus_fhc_match(struct device_node *np)
 343 {
 344         return !strcmp(np->name, "fhc") ||
 345                 !strcmp(np->name, "central");
 346 }
 347
 348 #define of_bus_fhc_count_cells of_bus_sbus_count_cells
 349
 350 /*
 351  * Array of bus specific translators
 352  */
 353
 354 static struct of_bus of_busses[] = {
 355         /* PCI */
 356         {
 357                 .name = "pci",
 358                 .addr_prop_name = "assigned-addresses",
 359                 .match = of_bus_pci_match,
 360                 .count_cells = of_bus_pci_count_cells,
 361                 .map = of_bus_pci_map,
 362                 .get_flags = of_bus_pci_get_flags,
 363         },
 364         /* SIMBA */
 365         {
 366                 .name = "simba",
 367                 .addr_prop_name = "assigned-addresses",
 368                 .match = of_bus_simba_match,
 369                 .count_cells = of_bus_pci_count_cells,
 370                 .map = of_bus_simba_map,
 371                 .get_flags = of_bus_pci_get_flags,
 372         },
 373         /* SBUS */
 374         {
 375                 .name = "sbus",
 376                 .addr_prop_name = "reg",
 377                 .match = of_bus_sbus_match,
 378                 .count_cells = of_bus_sbus_count_cells,
 379                 .map = of_bus_default_map,
 380                 .get_flags = of_bus_default_get_flags,
 381         },
 382         /* FHC */
 383         {
 384                 .name = "fhc",
 385                 .addr_prop_name = "reg",
 386                 .match = of_bus_fhc_match,
 387                 .count_cells = of_bus_fhc_count_cells,
 388                 .map = of_bus_default_map,
 389                 .get_flags = of_bus_default_get_flags,
 390         },
 391         /* Default */
 392         {
 393                 .name = "default",
 394                 .addr_prop_name = "reg",
 395                 .match = NULL,
 396                 .count_cells = of_bus_default_count_cells,
 397                 .map = of_bus_default_map,
 398                 .get_flags = of_bus_default_get_flags,
 399         },
 400 };
 401
 402 static struct of_bus *of_match_bus(struct device_node *np)
 403 {
 404         int i;
 405
 406         for (i = 0; i < ARRAY_SIZE(of_busses); i ++)
 407                 if (!of_busses[i].match || of_busses[i].match(np))
 408                         return &of_busses[i];
 409         BUG();
 410         return NULL;
 411 }
 412
 413 static int __init build_one_resource(struct device_node *parent,
 414                                      struct of_bus *bus,
 415                                      struct of_bus *pbus,
 416                                      u32 *addr,
 417                                      int na, int ns, int pna)
 418 {
 419         const u32 *ranges;
 420         int rone, rlen;
 421
 422         ranges = of_get_property(parent, "ranges", &rlen);
 423         if (ranges == NULL || rlen == 0) {
 424                 u32 result[OF_MAX_ADDR_CELLS];
 425                 int i;
 426
 427                 memset(result, 0, pna * 4);
 428                 for (i = 0; i < na; i++)
 429                         result[pna - 1 - i] =
 430                                 addr[na - 1 - i];
 431
 432                 memcpy(addr, result, pna * 4);
 433                 return 0;
 434         }
 435
 436         /* Now walk through the ranges */
 437         rlen /= 4;
 438         rone = na + pna + ns;
 439         for (; rlen >= rone; rlen -= rone, ranges += rone) {
 440                 if (!bus->map(addr, ranges, na, ns, pna))
 441                         return 0;
 442         }
 443
 444         /* When we miss an I/O space match on PCI, just pass it up
 445          * to the next PCI bridge and/or controller.
 446          */
 447         if (!strcmp(bus->name, "pci") &&
 448             (addr[0] & 0x03000000) == 0x01000000)
 449                 return 0;
 450
 451         return 1;
 452 }
 453
 454 static int __init use_1to1_mapping(struct device_node *pp)
 455 {
 456         /* If we have a ranges property in the parent, use it.  */
 457         if (of_find_property(pp, "ranges", NULL) != NULL)
 458                 return 0;
 459
 460         /* If the parent is the dma node of an ISA bus, pass
 461          * the translation up to the root.
 462          *
 463          * Some SBUS devices use intermediate nodes to express
 464          * hierarchy within the device itself.  These aren't
 465          * real bus nodes, and don't have a 'ranges' property.
 466          * But, we should still pass the translation work up
 467          * to the SBUS itself.
 468          */
 469         if (!strcmp(pp->name, "dma") ||
 470             !strcmp(pp->name, "espdma") ||
 471             !strcmp(pp->name, "ledma") ||
 472             !strcmp(pp->name, "lebuffer"))
 473                 return 0;
 474
 475         /* Similarly for all PCI bridges, if we get this far
 476          * it lacks a ranges property, and this will include
 477          * cases like Simba.
 478          */
 479         if (!strcmp(pp->name, "pci"))
 480                 return 0;
 481
 482         return 1;
 483 }
 484
 485 static int of_resource_verbose;
 486
 487 static void __init build_device_resources(struct of_device *op,
 488                                           struct device *parent)
 489 {
 490         struct of_device *p_op;
 491         struct of_bus *bus;
 492         int na, ns;
 493         int index, num_reg;
 494         const void *preg;
 495
 496         if (!parent)
 497                 return;
 498
 499         p_op = to_of_device(parent);
 500         bus = of_match_bus(p_op->node);
 501         bus->count_cells(op->node, &na, &ns);
 502
 503         preg = of_get_property(op->node, bus->addr_prop_name, &num_reg);
 504         if (!preg || num_reg == 0)
 505                 return;
 506
 507         /* Convert to num-cells.  */
 508         num_reg /= 4;
 509
 510         /* Convert to num-entries.  */
 511         num_reg /= na + ns;
 512
 513         /* Prevent overrunning the op->resources[] array.  */
 514         if (num_reg > PROMREG_MAX) {
 515                 printk(KERN_WARNING "%s: Too many regs (%d), "
 516                        "limiting to %d.\n",
 517                        op->node->full_name, num_reg, PROMREG_MAX);
 518                 num_reg = PROMREG_MAX;
 519         }
 520
 521         for (index = 0; index < num_reg; index++) {
 522                 struct resource *r = &op->resource[index];
 523                 u32 addr[OF_MAX_ADDR_CELLS];
 524                 const u32 *reg = (preg + (index * ((na + ns) * 4)));
 525                 struct device_node *dp = op->node;
 526                 struct device_node *pp = p_op->node;
 527                 struct of_bus *pbus, *dbus;
 528                 u64 size, result = OF_BAD_ADDR;
 529                 unsigned long flags;
 530                 int dna, dns;
 531                 int pna, pns;
 532
 533                 size = of_read_addr(reg + na, ns);
 534                 memcpy(addr, reg, na * 4);
 535
 536                 flags = bus->get_flags(addr, 0);
 537
 538                 if (use_1to1_mapping(pp)) {
 539                         result = of_read_addr(addr, na);
 540                         goto build_res;
 541                 }
 542
 543                 dna = na;
 544                 dns = ns;
 545                 dbus = bus;
 546
 547                 while (1) {
 548                         dp = pp;
 549                         pp = dp->parent;
 550                         if (!pp) {
 551                                 result = of_read_addr(addr, dna);
 552                                 break;
 553                         }
 554
 555                         pbus = of_match_bus(pp);
 556                         pbus->count_cells(dp, &pna, &pns);
 557
 558                         if (build_one_resource(dp, dbus, pbus, addr,
 559                                                dna, dns, pna))
 560                                 break;
 561
 562                         flags = pbus->get_flags(addr, flags);
 563
 564                         dna = pna;
 565                         dns = pns;
 566                         dbus = pbus;
 567                 }
 568
 569         build_res:
 570                 memset(r, 0, sizeof(*r));
 571
 572                 if (of_resource_verbose)
 573                         printk("%s reg[%d] -> %llx\n",
 574                                op->node->full_name, index,
 575                                result);
 576
 577                 if (result != OF_BAD_ADDR) {
 578                         if (tlb_type == hypervisor)
 579                                 result &= 0x0fffffffffffffffUL;
 580
 581                         r->start = result;
 582                         r->end = result + size - 1;
 583                         r->flags = flags;
 584                 }
 585                 r->name = op->node->name;
 586         }
 587 }
 588
 589 static struct device_node * __init
 590 apply_interrupt_map(struct device_node *dp, struct device_node *pp,
 591                     const u32 *imap, int imlen, const u32 *imask,
 592                     unsigned int *irq_p)
 593 {
 594         struct device_node *cp;
 595         unsigned int irq = *irq_p;
 596         struct of_bus *bus;
 597         phandle handle;
 598         const u32 *reg;
 599         int na, num_reg, i;
 600
 601         bus = of_match_bus(pp);
 602         bus->count_cells(dp, &na, NULL);
 603
 604         reg = of_get_property(dp, "reg", &num_reg);
 605         if (!reg || !num_reg)
 606                 return NULL;
 607
 608         imlen /= ((na + 3) * 4);
 609         handle = 0;
 610         for (i = 0; i < imlen; i++) {
 611                 int j;
 612
 613                 for (j = 0; j < na; j++) {
 614                         if ((reg[j] & imask[j]) != imap[j])
 615                                 goto next;
 616                 }
 617                 if (imap[na] == irq) {
 618                         handle = imap[na + 1];
 619                         irq = imap[na + 2];
 620                         break;
 621                 }
 622
 623         next:
 624                 imap += (na + 3);
 625         }
 626         if (i == imlen) {
 627                 /* Psycho and Sabre PCI controllers can have 'interrupt-map'
 628                  * properties that do not include the on-board device
 629                  * interrupts.  Instead, the device's 'interrupts' property
 630                  * is already a fully specified INO value.
 631                  *
 632                  * Handle this by deciding that, if we didn't get a
 633                  * match in the parent's 'interrupt-map', and the
 634                  * parent is an IRQ translater, then use the parent as
 635                  * our IRQ controller.
 636                  */
 637                 if (pp->irq_trans)
 638                         return pp;
 639
 640                 return NULL;
 641         }
 642
 643         *irq_p = irq;
 644         cp = of_find_node_by_phandle(handle);
 645
 646         return cp;
 647 }
 648
 649 static unsigned int __init pci_irq_swizzle(struct device_node *dp,
 650                                            struct device_node *pp,
 651                                            unsigned int irq)
 652 {
 653         const struct linux_prom_pci_registers *regs;
 654         unsigned int bus, devfn, slot, ret;
 655
 656         if (irq < 1 || irq > 4)
 657                 return irq;
 658
 659         regs = of_get_property(dp, "reg", NULL);
 660         if (!regs)
 661                 return irq;
 662
 663         bus = (regs->phys_hi >> 16) & 0xff;
 664         devfn = (regs->phys_hi >> 8) & 0xff;
 665         slot = (devfn >> 3) & 0x1f;
 666
 667         if (pp->irq_trans) {
 668                 /* Derived from Table 8-3, U2P User's Manual.  This branch
 669                  * is handling a PCI controller that lacks a proper set of
 670                  * interrupt-map and interrupt-map-mask properties.  The
 671                  * Ultra-E450 is one example.
 672                  *
 673                  * The bit layout is BSSLL, where:
 674                  * B: 0 on bus A, 1 on bus B
 675                  * D: 2-bit slot number, derived from PCI device number as
 676                  *    (dev - 1) for bus A, or (dev - 2) for bus B
 677                  * L: 2-bit line number
 678                  */
 679                 if (bus & 0x80) {
 680                         /* PBM-A */
 681                         bus  = 0x00;
 682                         slot = (slot - 1) << 2;
 683                 } else {
 684                         /* PBM-B */
 685                         bus  = 0x10;
 686                         slot = (slot - 2) << 2;
 687                 }
 688                 irq -= 1;
 689
 690                 ret = (bus | slot | irq);
 691         } else {
 692                 /* Going through a PCI-PCI bridge that lacks a set of
 693                  * interrupt-map and interrupt-map-mask properties.
 694                  */
 695                 ret = ((irq - 1 + (slot & 3)) & 3) + 1;
 696         }
 697
 698         return ret;
 699 }
 700
 701 static int of_irq_verbose;
 702
 703 static unsigned int __init build_one_device_irq(struct of_device *op,
 704                                                 struct device *parent,
 705                                                 unsigned int irq)
 706 {
 707         struct device_node *dp = op->node;
 708         struct device_node *pp, *ip;
 709         unsigned int orig_irq = irq;
 710         int nid;
 711
 712         if (irq == 0xffffffff)
 713                 return irq;
 714
 715         if (dp->irq_trans) {
 716                 irq = dp->irq_trans->irq_build(dp, irq,
 717                                                dp->irq_trans->data);
 718
 719                 if (of_irq_verbose)
 720                         printk("%s: direct translate %x --> %x\n",
 721                                dp->full_name, orig_irq, irq);
 722
 723                 goto out;
 724         }
 725
 726         /* Something more complicated.  Walk up to the root, applying
 727          * interrupt-map or bus specific translations, until we hit
 728          * an IRQ translator.
 729          *
 730          * If we hit a bus type or situation we cannot handle, we
 731          * stop and assume that the original IRQ number was in a
 732          * format which has special meaning to it's immediate parent.
 733          */
 734         pp = dp->parent;
 735         ip = NULL;
 736         while (pp) {
 737                 const void *imap, *imsk;
 738                 int imlen;
 739
 740                 imap = of_get_property(pp, "interrupt-map", &imlen);
 741                 imsk = of_get_property(pp, "interrupt-map-mask", NULL);
 742                 if (imap && imsk) {
 743                         struct device_node *iret;
 744                         int this_orig_irq = irq;
 745
 746                         iret = apply_interrupt_map(dp, pp,
 747                                                    imap, imlen, imsk,
 748                                                    &irq);
 749
 750                         if (of_irq_verbose)
 751                                 printk("%s: Apply [%s:%x] imap --> [%s:%x]\n",
 752                                        op->node->full_name,
 753                                        pp->full_name, this_orig_irq,
 754                                        (iret ? iret->full_name : "NULL"), irq);
 755
 756                         if (!iret)
 757                                 break;
 758
 759                         if (iret->irq_trans) {
 760                                 ip = iret;
 761                                 break;
 762                         }
 763                 } else {
 764                         if (!strcmp(pp->name, "pci")) {
 765                                 unsigned int this_orig_irq = irq;
 766
 767                                 irq = pci_irq_swizzle(dp, pp, irq);
 768                                 if (of_irq_verbose)
 769                                         printk("%s: PCI swizzle [%s] "
 770                                                "%x --> %x\n",
 771                                                op->node->full_name,
 772                                                pp->full_name, this_orig_irq,
 773                                                irq);
 774
 775                         }
 776
 777                         if (pp->irq_trans) {
 778                                 ip = pp;
 779                                 break;
 780                         }
 781                 }
 782                 dp = pp;
 783                 pp = pp->parent;
 784         }
 785         if (!ip)
 786                 return orig_irq;
 787
 788         irq = ip->irq_trans->irq_build(op->node, irq,
 789                                        ip->irq_trans->data);
 790         if (of_irq_verbose)
 791                 printk("%s: Apply IRQ trans [%s] %x --> %x\n",
 792                        op->node->full_name, ip->full_name, orig_irq, irq);
 793
 794 out:
 795         nid = of_node_to_nid(dp);
 796         if (nid != -1) {
 797                 cpumask_t numa_mask = *cpumask_of_node(nid);
 798
 799                 irq_set_affinity(irq, &numa_mask);
 800         }
 801
 802         return irq;
 803 }
 804
 805 static struct of_device * __init scan_one_device(struct device_node *dp,
 806                                                  struct device *parent)
 807 {
 808         struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL);
 809         const unsigned int *irq;
 810         struct dev_archdata *sd;
 811         int len, i;
 812
 813         if (!op)
 814                 return NULL;
 815
 816         sd = &op->dev.archdata;
 817         sd->prom_node = dp;
 818         sd->op = op;
 819
 820         op->node = dp;
 821
 822         op->clock_freq = of_getintprop_default(dp, "clock-frequency",
 823                                                (25*1000*1000));
 824         op->portid = of_getintprop_default(dp, "upa-portid", -1);
 825         if (op->portid == -1)
 826                 op->portid = of_getintprop_default(dp, "portid", -1);
 827
 828         irq = of_get_property(dp, "interrupts", &len);
 829         if (irq) {
 830                 op->num_irqs = len / 4;
 831
 832                 /* Prevent overrunning the op->irqs[] array.  */
 833                 if (op->num_irqs > PROMINTR_MAX) {
 834                         printk(KERN_WARNING "%s: Too many irqs (%d), "
 835                                "limiting to %d.\n",
 836                                dp->full_name, op->num_irqs, PROMINTR_MAX);
 837                         op->num_irqs = PROMINTR_MAX;
 838                 }
 839                 memcpy(op->irqs, irq, op->num_irqs * 4);
 840         } else {
 841                 op->num_irqs = 0;
 842         }
 843
 844         build_device_resources(op, parent);
 845         for (i = 0; i < op->num_irqs; i++)
 846                 op->irqs[i] = build_one_device_irq(op, parent, op->irqs[i]);
 847
 848         op->dev.parent = parent;
 849         op->dev.bus = &of_platform_bus_type;
 850         if (!parent)
 851                 dev_set_name(&op->dev, "root");
 852         else
 853                 dev_set_name(&op->dev, "%08x", dp->node);
 854
 855         if (of_device_register(op)) {
 856                 printk("%s: Could not register of device.\n",
 857                        dp->full_name);
 858                 kfree(op);
 859                 op = NULL;
 860         }
 861
 862         return op;
 863 }
 864
 865 static void __init scan_tree(struct device_node *dp, struct device *parent)
 866 {
 867         while (dp) {
 868                 struct of_device *op = scan_one_device(dp, parent);
 869
 870                 if (op)
 871                         scan_tree(dp->child, &op->dev);
 872
 873                 dp = dp->sibling;
 874         }
 875 }
 876
 877 static void __init scan_of_devices(void)
 878 {
 879         struct device_node *root = of_find_node_by_path("/");
 880         struct of_device *parent;
 881
 882         parent = scan_one_device(root, NULL);
 883         if (!parent)
 884                 return;
 885
 886         scan_tree(root->child, &parent->dev);
 887 }
 888
 889 static int __init of_bus_driver_init(void)
 890 {
 891         int err;
 892
 893         err = of_bus_type_init(&of_platform_bus_type, "of");
 894         if (!err)
 895                 scan_of_devices();
 896
 897         return err;
 898 }
 899
 900 postcore_initcall(of_bus_driver_init);
 901
 902 static int __init of_debug(char *str)
 903 {
 904         int val = 0;
 905
 906         get_option(&str, &val);
 907         if (val & 1)
 908                 of_resource_verbose = 1;
 909         if (val & 2)
 910                 of_irq_verbose = 1;
 911         return 1;
 912 }
 913
 914 __setup("of_debug=", of_debug);