arch/sparc64/kernel/of_device.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 __init get_cells(struct device_node *dp,
 103                              int *addrc, int *sizec)
 104 {
 105         if (addrc)
 106                 *addrc = of_n_addr_cells(dp);
 107         if (sizec)
 108                 *sizec = of_n_size_cells(dp);
 109 }
 110
 111 /* Max address size we deal with */
 112 #define OF_MAX_ADDR_CELLS       4
 113
 114 struct of_bus {
 115         const char      *name;
 116         const char      *addr_prop_name;
 117         int             (*match)(struct device_node *parent);
 118         void            (*count_cells)(struct device_node *child,
 119                                        int *addrc, int *sizec);
 120         int             (*map)(u32 *addr, const u32 *range,
 121                                int na, int ns, int pna);
 122         unsigned long   (*get_flags)(const u32 *addr, unsigned long);
 123 };
 124
 125 /*
 126  * Default translator (generic bus)
 127  */
 128
 129 static void of_bus_default_count_cells(struct device_node *dev,
 130                                        int *addrc, int *sizec)
 131 {
 132         get_cells(dev, addrc, sizec);
 133 }
 134
 135 /* Make sure the least significant 64-bits are in-range.  Even
 136  * for 3 or 4 cell values it is a good enough approximation.
 137  */
 138 static int of_out_of_range(const u32 *addr, const u32 *base,
 139                            const u32 *size, int na, int ns)
 140 {
 141         u64 a = of_read_addr(addr, na);
 142         u64 b = of_read_addr(base, na);
 143
 144         if (a < b)
 145                 return 1;
 146
 147         b += of_read_addr(size, ns);
 148         if (a >= b)
 149                 return 1;
 150
 151         return 0;
 152 }
 153
 154 static int of_bus_default_map(u32 *addr, const u32 *range,
 155                               int na, int ns, int pna)
 156 {
 157         u32 result[OF_MAX_ADDR_CELLS];
 158         int i;
 159
 160         if (ns > 2) {
 161                 printk("of_device: Cannot handle size cells (%d) > 2.", ns);
 162                 return -EINVAL;
 163         }
 164
 165         if (of_out_of_range(addr, range, range + na + pna, na, ns))
 166                 return -EINVAL;
 167
 168         /* Start with the parent range base.  */
 169         memcpy(result, range + na, pna * 4);
 170
 171         /* Add in the child address offset.  */
 172         for (i = 0; i < na; i++)
 173                 result[pna - 1 - i] +=
 174                         (addr[na - 1 - i] -
 175                          range[na - 1 - i]);
 176
 177         memcpy(addr, result, pna * 4);
 178
 179         return 0;
 180 }
 181
 182 static unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags)
 183 {
 184         if (flags)
 185                 return flags;
 186         return IORESOURCE_MEM;
 187 }
 188
 189 /*
 190  * PCI bus specific translator
 191  */
 192
 193 static int of_bus_pci_match(struct device_node *np)
 194 {
 195         if (!strcmp(np->name, "pci")) {
 196                 const char *model = of_get_property(np, "model", NULL);
 197
 198                 if (model && !strcmp(model, "SUNW,simba"))
 199                         return 0;
 200
 201                 /* Do not do PCI specific frobbing if the
 202                  * PCI bridge lacks a ranges property.  We
 203                  * want to pass it through up to the next
 204                  * parent as-is, not with the PCI translate
 205                  * method which chops off the top address cell.
 206                  */
 207                 if (!of_find_property(np, "ranges", NULL))
 208                         return 0;
 209
 210                 return 1;
 211         }
 212
 213         return 0;
 214 }
 215
 216 static int of_bus_simba_match(struct device_node *np)
 217 {
 218         const char *model = of_get_property(np, "model", NULL);
 219
 220         if (model && !strcmp(model, "SUNW,simba"))
 221                 return 1;
 222
 223         /* Treat PCI busses lacking ranges property just like
 224          * simba.
 225          */
 226         if (!strcmp(np->name, "pci")) {
 227                 if (!of_find_property(np, "ranges", NULL))
 228                         return 1;
 229         }
 230
 231         return 0;
 232 }
 233
 234 static int of_bus_simba_map(u32 *addr, const u32 *range,
 235                             int na, int ns, int pna)
 236 {
 237         return 0;
 238 }
 239
 240 static void of_bus_pci_count_cells(struct device_node *np,
 241                                    int *addrc, int *sizec)
 242 {
 243         if (addrc)
 244                 *addrc = 3;
 245         if (sizec)
 246                 *sizec = 2;
 247 }
 248
 249 static int of_bus_pci_map(u32 *addr, const u32 *range,
 250                           int na, int ns, int pna)
 251 {
 252         u32 result[OF_MAX_ADDR_CELLS];
 253         int i;
 254
 255         /* Check address type match */
 256         if ((addr[0] ^ range[0]) & 0x03000000)
 257                 return -EINVAL;
 258
 259         if (of_out_of_range(addr + 1, range + 1, range + na + pna,
 260                             na - 1, ns))
 261                 return -EINVAL;
 262
 263         /* Start with the parent range base.  */
 264         memcpy(result, range + na, pna * 4);
 265
 266         /* Add in the child address offset, skipping high cell.  */
 267         for (i = 0; i < na - 1; i++)
 268                 result[pna - 1 - i] +=
 269                         (addr[na - 1 - i] -
 270                          range[na - 1 - i]);
 271
 272         memcpy(addr, result, pna * 4);
 273
 274         return 0;
 275 }
 276
 277 static unsigned long of_bus_pci_get_flags(const u32 *addr, unsigned long flags)
 278 {
 279         u32 w = addr[0];
 280
 281         /* For PCI, we override whatever child busses may have used.  */
 282         flags = 0;
 283         switch((w >> 24) & 0x03) {
 284         case 0x01:
 285                 flags |= IORESOURCE_IO;
 286                 break;
 287
 288         case 0x02: /* 32 bits */
 289         case 0x03: /* 64 bits */
 290                 flags |= IORESOURCE_MEM;
 291                 break;
 292         }
 293         if (w & 0x40000000)
 294                 flags |= IORESOURCE_PREFETCH;
 295         return flags;
 296 }
 297
 298 /*
 299  * SBUS bus specific translator
 300  */
 301
 302 static int of_bus_sbus_match(struct device_node *np)
 303 {
 304         return !strcmp(np->name, "sbus") ||
 305                 !strcmp(np->name, "sbi");
 306 }
 307
 308 static void of_bus_sbus_count_cells(struct device_node *child,
 309                                    int *addrc, int *sizec)
 310 {
 311         if (addrc)
 312                 *addrc = 2;
 313         if (sizec)
 314                 *sizec = 1;
 315 }
 316
 317 /*
 318  * FHC/Central bus specific translator.
 319  *
 320  * This is just needed to hard-code the address and size cell
 321  * counts.  'fhc' and 'central' nodes lack the #address-cells and
 322  * #size-cells properties, and if you walk to the root on such
 323  * Enterprise boxes all you'll get is a #size-cells of 2 which is
 324  * not what we want to use.
 325  */
 326 static int of_bus_fhc_match(struct device_node *np)
 327 {
 328         return !strcmp(np->name, "fhc") ||
 329                 !strcmp(np->name, "central");
 330 }
 331
 332 #define of_bus_fhc_count_cells of_bus_sbus_count_cells
 333
 334 /*
 335  * Array of bus specific translators
 336  */
 337
 338 static struct of_bus of_busses[] = {
 339         /* PCI */
 340         {
 341                 .name = "pci",
 342                 .addr_prop_name = "assigned-addresses",
 343                 .match = of_bus_pci_match,
 344                 .count_cells = of_bus_pci_count_cells,
 345                 .map = of_bus_pci_map,
 346                 .get_flags = of_bus_pci_get_flags,
 347         },
 348         /* SIMBA */
 349         {
 350                 .name = "simba",
 351                 .addr_prop_name = "assigned-addresses",
 352                 .match = of_bus_simba_match,
 353                 .count_cells = of_bus_pci_count_cells,
 354                 .map = of_bus_simba_map,
 355                 .get_flags = of_bus_pci_get_flags,
 356         },
 357         /* SBUS */
 358         {
 359                 .name = "sbus",
 360                 .addr_prop_name = "reg",
 361                 .match = of_bus_sbus_match,
 362                 .count_cells = of_bus_sbus_count_cells,
 363                 .map = of_bus_default_map,
 364                 .get_flags = of_bus_default_get_flags,
 365         },
 366         /* FHC */
 367         {
 368                 .name = "fhc",
 369                 .addr_prop_name = "reg",
 370                 .match = of_bus_fhc_match,
 371                 .count_cells = of_bus_fhc_count_cells,
 372                 .map = of_bus_default_map,
 373                 .get_flags = of_bus_default_get_flags,
 374         },
 375         /* Default */
 376         {
 377                 .name = "default",
 378                 .addr_prop_name = "reg",
 379                 .match = NULL,
 380                 .count_cells = of_bus_default_count_cells,
 381                 .map = of_bus_default_map,
 382                 .get_flags = of_bus_default_get_flags,
 383         },
 384 };
 385
 386 static struct of_bus *of_match_bus(struct device_node *np)
 387 {
 388         int i;
 389
 390         for (i = 0; i < ARRAY_SIZE(of_busses); i ++)
 391                 if (!of_busses[i].match || of_busses[i].match(np))
 392                         return &of_busses[i];
 393         BUG();
 394         return NULL;
 395 }
 396
 397 static int __init build_one_resource(struct device_node *parent,
 398                                      struct of_bus *bus,
 399                                      struct of_bus *pbus,
 400                                      u32 *addr,
 401                                      int na, int ns, int pna)
 402 {
 403         const u32 *ranges;
 404         int rone, rlen;
 405
 406         ranges = of_get_property(parent, "ranges", &rlen);
 407         if (ranges == NULL || rlen == 0) {
 408                 u32 result[OF_MAX_ADDR_CELLS];
 409                 int i;
 410
 411                 memset(result, 0, pna * 4);
 412                 for (i = 0; i < na; i++)
 413                         result[pna - 1 - i] =
 414                                 addr[na - 1 - i];
 415
 416                 memcpy(addr, result, pna * 4);
 417                 return 0;
 418         }
 419
 420         /* Now walk through the ranges */
 421         rlen /= 4;
 422         rone = na + pna + ns;
 423         for (; rlen >= rone; rlen -= rone, ranges += rone) {
 424                 if (!bus->map(addr, ranges, na, ns, pna))
 425                         return 0;
 426         }
 427
 428         /* When we miss an I/O space match on PCI, just pass it up
 429          * to the next PCI bridge and/or controller.
 430          */
 431         if (!strcmp(bus->name, "pci") &&
 432             (addr[0] & 0x03000000) == 0x01000000)
 433                 return 0;
 434
 435         return 1;
 436 }
 437
 438 static int __init use_1to1_mapping(struct device_node *pp)
 439 {
 440         /* If we have a ranges property in the parent, use it.  */
 441         if (of_find_property(pp, "ranges", NULL) != NULL)
 442                 return 0;
 443
 444         /* If the parent is the dma node of an ISA bus, pass
 445          * the translation up to the root.
 446          *
 447          * Some SBUS devices use intermediate nodes to express
 448          * hierarchy within the device itself.  These aren't
 449          * real bus nodes, and don't have a 'ranges' property.
 450          * But, we should still pass the translation work up
 451          * to the SBUS itself.
 452          */
 453         if (!strcmp(pp->name, "dma") ||
 454             !strcmp(pp->name, "espdma") ||
 455             !strcmp(pp->name, "ledma") ||
 456             !strcmp(pp->name, "lebuffer"))
 457                 return 0;
 458
 459         /* Similarly for all PCI bridges, if we get this far
 460          * it lacks a ranges property, and this will include
 461          * cases like Simba.
 462          */
 463         if (!strcmp(pp->name, "pci"))
 464                 return 0;
 465
 466         return 1;
 467 }
 468
 469 static int of_resource_verbose;
 470
 471 static void __init build_device_resources(struct of_device *op,
 472                                           struct device *parent)
 473 {
 474         struct of_device *p_op;
 475         struct of_bus *bus;
 476         int na, ns;
 477         int index, num_reg;
 478         const void *preg;
 479
 480         if (!parent)
 481                 return;
 482
 483         p_op = to_of_device(parent);
 484         bus = of_match_bus(p_op->node);
 485         bus->count_cells(op->node, &na, &ns);
 486
 487         preg = of_get_property(op->node, bus->addr_prop_name, &num_reg);
 488         if (!preg || num_reg == 0)
 489                 return;
 490
 491         /* Convert to num-cells.  */
 492         num_reg /= 4;
 493
 494         /* Convert to num-entries.  */
 495         num_reg /= na + ns;
 496
 497         /* Prevent overrunning the op->resources[] array.  */
 498         if (num_reg > PROMREG_MAX) {
 499                 printk(KERN_WARNING "%s: Too many regs (%d), "
 500                        "limiting to %d.\n",
 501                        op->node->full_name, num_reg, PROMREG_MAX);
 502                 num_reg = PROMREG_MAX;
 503         }
 504
 505         for (index = 0; index < num_reg; index++) {
 506                 struct resource *r = &op->resource[index];
 507                 u32 addr[OF_MAX_ADDR_CELLS];
 508                 const u32 *reg = (preg + (index * ((na + ns) * 4)));
 509                 struct device_node *dp = op->node;
 510                 struct device_node *pp = p_op->node;
 511                 struct of_bus *pbus, *dbus;
 512                 u64 size, result = OF_BAD_ADDR;
 513                 unsigned long flags;
 514                 int dna, dns;
 515                 int pna, pns;
 516
 517                 size = of_read_addr(reg + na, ns);
 518                 memcpy(addr, reg, na * 4);
 519
 520                 flags = bus->get_flags(addr, 0);
 521
 522                 if (use_1to1_mapping(pp)) {
 523                         result = of_read_addr(addr, na);
 524                         goto build_res;
 525                 }
 526
 527                 dna = na;
 528                 dns = ns;
 529                 dbus = bus;
 530
 531                 while (1) {
 532                         dp = pp;
 533                         pp = dp->parent;
 534                         if (!pp) {
 535                                 result = of_read_addr(addr, dna);
 536                                 break;
 537                         }
 538
 539                         pbus = of_match_bus(pp);
 540                         pbus->count_cells(dp, &pna, &pns);
 541
 542                         if (build_one_resource(dp, dbus, pbus, addr,
 543                                                dna, dns, pna))
 544                                 break;
 545
 546                         flags = pbus->get_flags(addr, flags);
 547
 548                         dna = pna;
 549                         dns = pns;
 550                         dbus = pbus;
 551                 }
 552
 553         build_res:
 554                 memset(r, 0, sizeof(*r));
 555
 556                 if (of_resource_verbose)
 557                         printk("%s reg[%d] -> %lx\n",
 558                                op->node->full_name, index,
 559                                result);
 560
 561                 if (result != OF_BAD_ADDR) {
 562                         if (tlb_type == hypervisor)
 563                                 result &= 0x0fffffffffffffffUL;
 564
 565                         r->start = result;
 566                         r->end = result + size - 1;
 567                         r->flags = flags;
 568                 }
 569                 r->name = op->node->name;
 570         }
 571 }
 572
 573 static struct device_node * __init
 574 apply_interrupt_map(struct device_node *dp, struct device_node *pp,
 575                     const u32 *imap, int imlen, const u32 *imask,
 576                     unsigned int *irq_p)
 577 {
 578         struct device_node *cp;
 579         unsigned int irq = *irq_p;
 580         struct of_bus *bus;
 581         phandle handle;
 582         const u32 *reg;
 583         int na, num_reg, i;
 584
 585         bus = of_match_bus(pp);
 586         bus->count_cells(dp, &na, NULL);
 587
 588         reg = of_get_property(dp, "reg", &num_reg);
 589         if (!reg || !num_reg)
 590                 return NULL;
 591
 592         imlen /= ((na + 3) * 4);
 593         handle = 0;
 594         for (i = 0; i < imlen; i++) {
 595                 int j;
 596
 597                 for (j = 0; j < na; j++) {
 598                         if ((reg[j] & imask[j]) != imap[j])
 599                                 goto next;
 600                 }
 601                 if (imap[na] == irq) {
 602                         handle = imap[na + 1];
 603                         irq = imap[na + 2];
 604                         break;
 605                 }
 606
 607         next:
 608                 imap += (na + 3);
 609         }
 610         if (i == imlen) {
 611                 /* Psycho and Sabre PCI controllers can have 'interrupt-map'
 612                  * properties that do not include the on-board device
 613                  * interrupts.  Instead, the device's 'interrupts' property
 614                  * is already a fully specified INO value.
 615                  *
 616                  * Handle this by deciding that, if we didn't get a
 617                  * match in the parent's 'interrupt-map', and the
 618                  * parent is an IRQ translater, then use the parent as
 619                  * our IRQ controller.
 620                  */
 621                 if (pp->irq_trans)
 622                         return pp;
 623
 624                 return NULL;
 625         }
 626
 627         *irq_p = irq;
 628         cp = of_find_node_by_phandle(handle);
 629
 630         return cp;
 631 }
 632
 633 static unsigned int __init pci_irq_swizzle(struct device_node *dp,
 634                                            struct device_node *pp,
 635                                            unsigned int irq)
 636 {
 637         const struct linux_prom_pci_registers *regs;
 638         unsigned int bus, devfn, slot, ret;
 639
 640         if (irq < 1 || irq > 4)
 641                 return irq;
 642
 643         regs = of_get_property(dp, "reg", NULL);
 644         if (!regs)
 645                 return irq;
 646
 647         bus = (regs->phys_hi >> 16) & 0xff;
 648         devfn = (regs->phys_hi >> 8) & 0xff;
 649         slot = (devfn >> 3) & 0x1f;
 650
 651         if (pp->irq_trans) {
 652                 /* Derived from Table 8-3, U2P User's Manual.  This branch
 653                  * is handling a PCI controller that lacks a proper set of
 654                  * interrupt-map and interrupt-map-mask properties.  The
 655                  * Ultra-E450 is one example.
 656                  *
 657                  * The bit layout is BSSLL, where:
 658                  * B: 0 on bus A, 1 on bus B
 659                  * D: 2-bit slot number, derived from PCI device number as
 660                  *    (dev - 1) for bus A, or (dev - 2) for bus B
 661                  * L: 2-bit line number
 662                  */
 663                 if (bus & 0x80) {
 664                         /* PBM-A */
 665                         bus  = 0x00;
 666                         slot = (slot - 1) << 2;
 667                 } else {
 668                         /* PBM-B */
 669                         bus  = 0x10;
 670                         slot = (slot - 2) << 2;
 671                 }
 672                 irq -= 1;
 673
 674                 ret = (bus | slot | irq);
 675         } else {
 676                 /* Going through a PCI-PCI bridge that lacks a set of
 677                  * interrupt-map and interrupt-map-mask properties.
 678                  */
 679                 ret = ((irq - 1 + (slot & 3)) & 3) + 1;
 680         }
 681
 682         return ret;
 683 }
 684
 685 static int of_irq_verbose;
 686
 687 static unsigned int __init build_one_device_irq(struct of_device *op,
 688                                                 struct device *parent,
 689                                                 unsigned int irq)
 690 {
 691         struct device_node *dp = op->node;
 692         struct device_node *pp, *ip;
 693         unsigned int orig_irq = irq;
 694         int nid;
 695
 696         if (irq == 0xffffffff)
 697                 return irq;
 698
 699         if (dp->irq_trans) {
 700                 irq = dp->irq_trans->irq_build(dp, irq,
 701                                                dp->irq_trans->data);
 702
 703                 if (of_irq_verbose)
 704                         printk("%s: direct translate %x --> %x\n",
 705                                dp->full_name, orig_irq, irq);
 706
 707                 goto out;
 708         }
 709
 710         /* Something more complicated.  Walk up to the root, applying
 711          * interrupt-map or bus specific translations, until we hit
 712          * an IRQ translator.
 713          *
 714          * If we hit a bus type or situation we cannot handle, we
 715          * stop and assume that the original IRQ number was in a
 716          * format which has special meaning to it's immediate parent.
 717          */
 718         pp = dp->parent;
 719         ip = NULL;
 720         while (pp) {
 721                 const void *imap, *imsk;
 722                 int imlen;
 723
 724                 imap = of_get_property(pp, "interrupt-map", &imlen);
 725                 imsk = of_get_property(pp, "interrupt-map-mask", NULL);
 726                 if (imap && imsk) {
 727                         struct device_node *iret;
 728                         int this_orig_irq = irq;
 729
 730                         iret = apply_interrupt_map(dp, pp,
 731                                                    imap, imlen, imsk,
 732                                                    &irq);
 733
 734                         if (of_irq_verbose)
 735                                 printk("%s: Apply [%s:%x] imap --> [%s:%x]\n",
 736                                        op->node->full_name,
 737                                        pp->full_name, this_orig_irq,
 738                                        (iret ? iret->full_name : "NULL"), irq);
 739
 740                         if (!iret)
 741                                 break;
 742
 743                         if (iret->irq_trans) {
 744                                 ip = iret;
 745                                 break;
 746                         }
 747                 } else {
 748                         if (!strcmp(pp->name, "pci")) {
 749                                 unsigned int this_orig_irq = irq;
 750
 751                                 irq = pci_irq_swizzle(dp, pp, irq);
 752                                 if (of_irq_verbose)
 753                                         printk("%s: PCI swizzle [%s] "
 754                                                "%x --> %x\n",
 755                                                op->node->full_name,
 756                                                pp->full_name, this_orig_irq,
 757                                                irq);
 758
 759                         }
 760
 761                         if (pp->irq_trans) {
 762                                 ip = pp;
 763                                 break;
 764                         }
 765                 }
 766                 dp = pp;
 767                 pp = pp->parent;
 768         }
 769         if (!ip)
 770                 return orig_irq;
 771
 772         irq = ip->irq_trans->irq_build(op->node, irq,
 773                                        ip->irq_trans->data);
 774         if (of_irq_verbose)
 775                 printk("%s: Apply IRQ trans [%s] %x --> %x\n",
 776                        op->node->full_name, ip->full_name, orig_irq, irq);
 777
 778 out:
 779         nid = of_node_to_nid(dp);
 780         if (nid != -1) {
 781                 cpumask_t numa_mask = node_to_cpumask(nid);
 782
 783                 irq_set_affinity(irq, numa_mask);
 784         }
 785
 786         return irq;
 787 }
 788
 789 static struct of_device * __init scan_one_device(struct device_node *dp,
 790                                                  struct device *parent)
 791 {
 792         struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL);
 793         const unsigned int *irq;
 794         struct dev_archdata *sd;
 795         int len, i;
 796
 797         if (!op)
 798                 return NULL;
 799
 800         sd = &op->dev.archdata;
 801         sd->prom_node = dp;
 802         sd->op = op;
 803
 804         op->node = dp;
 805
 806         op->clock_freq = of_getintprop_default(dp, "clock-frequency",
 807                                                (25*1000*1000));
 808         op->portid = of_getintprop_default(dp, "upa-portid", -1);
 809         if (op->portid == -1)
 810                 op->portid = of_getintprop_default(dp, "portid", -1);
 811
 812         irq = of_get_property(dp, "interrupts", &len);
 813         if (irq) {
 814                 memcpy(op->irqs, irq, len);
 815                 op->num_irqs = len / 4;
 816         } else {
 817                 op->num_irqs = 0;
 818         }
 819
 820         /* Prevent overrunning the op->irqs[] array.  */
 821         if (op->num_irqs > PROMINTR_MAX) {
 822                 printk(KERN_WARNING "%s: Too many irqs (%d), "
 823                        "limiting to %d.\n",
 824                        dp->full_name, op->num_irqs, PROMINTR_MAX);
 825                 op->num_irqs = PROMINTR_MAX;
 826         }
 827
 828         build_device_resources(op, parent);
 829         for (i = 0; i < op->num_irqs; i++)
 830                 op->irqs[i] = build_one_device_irq(op, parent, op->irqs[i]);
 831
 832         op->dev.parent = parent;
 833         op->dev.bus = &of_platform_bus_type;
 834         if (!parent)
 835                 dev_set_name(&op->dev, "root");
 836         else
 837                 dev_set_name(&op->dev, "%08x", dp->node);
 838
 839         if (of_device_register(op)) {
 840                 printk("%s: Could not register of device.\n",
 841                        dp->full_name);
 842                 kfree(op);
 843                 op = NULL;
 844         }
 845
 846         return op;
 847 }
 848
 849 static void __init scan_tree(struct device_node *dp, struct device *parent)
 850 {
 851         while (dp) {
 852                 struct of_device *op = scan_one_device(dp, parent);
 853
 854                 if (op)
 855                         scan_tree(dp->child, &op->dev);
 856
 857                 dp = dp->sibling;
 858         }
 859 }
 860
 861 static void __init scan_of_devices(void)
 862 {
 863         struct device_node *root = of_find_node_by_path("/");
 864         struct of_device *parent;
 865
 866         parent = scan_one_device(root, NULL);
 867         if (!parent)
 868                 return;
 869
 870         scan_tree(root->child, &parent->dev);
 871 }
 872
 873 static int __init of_bus_driver_init(void)
 874 {
 875         int err;
 876
 877         err = of_bus_type_init(&of_platform_bus_type, "of");
 878         if (!err)
 879                 scan_of_devices();
 880
 881         return err;
 882 }
 883
 884 postcore_initcall(of_bus_driver_init);
 885
 886 static int __init of_debug(char *str)
 887 {
 888         int val = 0;
 889
 890         get_option(&str, &val);
 891         if (val & 1)
 892                 of_resource_verbose = 1;
 893         if (val & 2)
 894                 of_irq_verbose = 1;
 895         return 1;
 896 }
 897
 898 __setup("of_debug=", of_debug);