arch/sparc64/kernel/ebus.c

   1 /* $Id: ebus.c,v 1.64 2001/11/08 04:41:33 davem Exp $
   2  * ebus.c: PCI to EBus bridge device.
   3  *
   4  * Copyright (C) 1997  Eddie C. Dost  (ecd@skynet.be)
   5  * Copyright (C) 1999  David S. Miller (davem@redhat.com)
   6  */
   7
   8 #include <linux/config.h>
   9 #include <linux/module.h>
  10 #include <linux/kernel.h>
  11 #include <linux/types.h>
  12 #include <linux/init.h>
  13 #include <linux/slab.h>
  14 #include <linux/string.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/delay.h>
  17
  18 #include <asm/system.h>
  19 #include <asm/page.h>
  20 #include <asm/pbm.h>
  21 #include <asm/ebus.h>
  22 #include <asm/oplib.h>
  23 #include <asm/bpp.h>
  24 #include <asm/irq.h>
  25
  26 /* EBUS dma library. */
  27
  28 #define EBDMA_CSR       0x00UL  /* Control/Status */
  29 #define EBDMA_ADDR      0x04UL  /* DMA Address */
  30 #define EBDMA_COUNT     0x08UL  /* DMA Count */
  31
  32 #define EBDMA_CSR_INT_PEND      0x00000001
  33 #define EBDMA_CSR_ERR_PEND      0x00000002
  34 #define EBDMA_CSR_DRAIN         0x00000004
  35 #define EBDMA_CSR_INT_EN        0x00000010
  36 #define EBDMA_CSR_RESET         0x00000080
  37 #define EBDMA_CSR_WRITE         0x00000100
  38 #define EBDMA_CSR_EN_DMA        0x00000200
  39 #define EBDMA_CSR_CYC_PEND      0x00000400
  40 #define EBDMA_CSR_DIAG_RD_DONE  0x00000800
  41 #define EBDMA_CSR_DIAG_WR_DONE  0x00001000
  42 #define EBDMA_CSR_EN_CNT        0x00002000
  43 #define EBDMA_CSR_TC            0x00004000
  44 #define EBDMA_CSR_DIS_CSR_DRN   0x00010000
  45 #define EBDMA_CSR_BURST_SZ_MASK 0x000c0000
  46 #define EBDMA_CSR_BURST_SZ_1    0x00080000
  47 #define EBDMA_CSR_BURST_SZ_4    0x00000000
  48 #define EBDMA_CSR_BURST_SZ_8    0x00040000
  49 #define EBDMA_CSR_BURST_SZ_16   0x000c0000
  50 #define EBDMA_CSR_DIAG_EN       0x00100000
  51 #define EBDMA_CSR_DIS_ERR_PEND  0x00400000
  52 #define EBDMA_CSR_TCI_DIS       0x00800000
  53 #define EBDMA_CSR_EN_NEXT       0x01000000
  54 #define EBDMA_CSR_DMA_ON        0x02000000
  55 #define EBDMA_CSR_A_LOADED      0x04000000
  56 #define EBDMA_CSR_NA_LOADED     0x08000000
  57 #define EBDMA_CSR_DEV_ID_MASK   0xf0000000
  58
  59 #define EBUS_DMA_RESET_TIMEOUT  10000
  60
  61 static void __ebus_dma_reset(struct ebus_dma_info *p, int no_drain)
  62 {
  63         int i;
  64         u32 val = 0;
  65
  66         writel(EBDMA_CSR_RESET, p->regs + EBDMA_CSR);
  67         udelay(1);
  68
  69         if (no_drain)
  70                 return;
  71
  72         for (i = EBUS_DMA_RESET_TIMEOUT; i > 0; i--) {
  73                 val = readl(p->regs + EBDMA_CSR);
  74
  75                 if (!(val & (EBDMA_CSR_DRAIN | EBDMA_CSR_CYC_PEND)))
  76                         break;
  77                 udelay(10);
  78         }
  79 }
  80
  81 static irqreturn_t ebus_dma_irq(int irq, void *dev_id, struct pt_regs *regs)
  82 {
  83         struct ebus_dma_info *p = dev_id;
  84         unsigned long flags;
  85         u32 csr = 0;
  86
  87         spin_lock_irqsave(&p->lock, flags);
  88         csr = readl(p->regs + EBDMA_CSR);
  89         writel(csr, p->regs + EBDMA_CSR);
  90         spin_unlock_irqrestore(&p->lock, flags);
  91
  92         if (csr & EBDMA_CSR_ERR_PEND) {
  93                 printk(KERN_CRIT "ebus_dma(%s): DMA error!\n", p->name);
  94                 p->callback(p, EBUS_DMA_EVENT_ERROR, p->client_cookie);
  95                 return IRQ_HANDLED;
  96         } else if (csr & EBDMA_CSR_INT_PEND) {
  97                 p->callback(p,
  98                             (csr & EBDMA_CSR_TC) ?
  99                             EBUS_DMA_EVENT_DMA : EBUS_DMA_EVENT_DEVICE,
 100                             p->client_cookie);
 101                 return IRQ_HANDLED;
 102         }
 103
 104         return IRQ_NONE;
 105
 106 }
 107
 108 int ebus_dma_register(struct ebus_dma_info *p)
 109 {
 110         u32 csr;
 111
 112         if (!p->regs)
 113                 return -EINVAL;
 114         if (p->flags & ~(EBUS_DMA_FLAG_USE_EBDMA_HANDLER |
 115                          EBUS_DMA_FLAG_TCI_DISABLE))
 116                 return -EINVAL;
 117         if ((p->flags & EBUS_DMA_FLAG_USE_EBDMA_HANDLER) && !p->callback)
 118                 return -EINVAL;
 119         if (!strlen(p->name))
 120                 return -EINVAL;
 121
 122         __ebus_dma_reset(p, 1);
 123
 124         csr = EBDMA_CSR_BURST_SZ_16 | EBDMA_CSR_EN_CNT;
 125
 126         if (p->flags & EBUS_DMA_FLAG_TCI_DISABLE)
 127                 csr |= EBDMA_CSR_TCI_DIS;
 128
 129         writel(csr, p->regs + EBDMA_CSR);
 130
 131         return 0;
 132 }
 133 EXPORT_SYMBOL(ebus_dma_register);
 134
 135 int ebus_dma_irq_enable(struct ebus_dma_info *p, int on)
 136 {
 137         unsigned long flags;
 138         u32 csr;
 139
 140         if (on) {
 141                 if (p->flags & EBUS_DMA_FLAG_USE_EBDMA_HANDLER) {
 142                         if (request_irq(p->irq, ebus_dma_irq, SA_SHIRQ, p->name, p))
 143                                 return -EBUSY;
 144                 }
 145
 146                 spin_lock_irqsave(&p->lock, flags);
 147                 csr = readl(p->regs + EBDMA_CSR);
 148                 csr |= EBDMA_CSR_INT_EN;
 149                 writel(csr, p->regs + EBDMA_CSR);
 150                 spin_unlock_irqrestore(&p->lock, flags);
 151         } else {
 152                 spin_lock_irqsave(&p->lock, flags);
 153                 csr = readl(p->regs + EBDMA_CSR);
 154                 csr &= ~EBDMA_CSR_INT_EN;
 155                 writel(csr, p->regs + EBDMA_CSR);
 156                 spin_unlock_irqrestore(&p->lock, flags);
 157
 158                 if (p->flags & EBUS_DMA_FLAG_USE_EBDMA_HANDLER) {
 159                         free_irq(p->irq, p);
 160                 }
 161         }
 162
 163         return 0;
 164 }
 165 EXPORT_SYMBOL(ebus_dma_irq_enable);
 166
 167 void ebus_dma_unregister(struct ebus_dma_info *p)
 168 {
 169         unsigned long flags;
 170         u32 csr;
 171         int irq_on = 0;
 172
 173         spin_lock_irqsave(&p->lock, flags);
 174         csr = readl(p->regs + EBDMA_CSR);
 175         if (csr & EBDMA_CSR_INT_EN) {
 176                 csr &= ~EBDMA_CSR_INT_EN;
 177                 writel(csr, p->regs + EBDMA_CSR);
 178                 irq_on = 1;
 179         }
 180         spin_unlock_irqrestore(&p->lock, flags);
 181
 182         if (irq_on)
 183                 free_irq(p->irq, p);
 184 }
 185 EXPORT_SYMBOL(ebus_dma_unregister);
 186
 187 int ebus_dma_request(struct ebus_dma_info *p, dma_addr_t bus_addr, size_t len)
 188 {
 189         unsigned long flags;
 190         u32 csr;
 191         int err;
 192
 193         if (len >= (1 << 24))
 194                 return -EINVAL;
 195
 196         spin_lock_irqsave(&p->lock, flags);
 197         csr = readl(p->regs + EBDMA_CSR);
 198         err = -EINVAL;
 199         if (!(csr & EBDMA_CSR_EN_DMA))
 200                 goto out;
 201         err = -EBUSY;
 202         if (csr & EBDMA_CSR_NA_LOADED)
 203                 goto out;
 204
 205         writel(len,      p->regs + EBDMA_COUNT);
 206         writel(bus_addr, p->regs + EBDMA_ADDR);
 207         err = 0;
 208
 209 out:
 210         spin_unlock_irqrestore(&p->lock, flags);
 211
 212         return err;
 213 }
 214 EXPORT_SYMBOL(ebus_dma_request);
 215
 216 void ebus_dma_prepare(struct ebus_dma_info *p, int write)
 217 {
 218         unsigned long flags;
 219         u32 csr;
 220
 221         spin_lock_irqsave(&p->lock, flags);
 222         __ebus_dma_reset(p, 0);
 223
 224         csr = (EBDMA_CSR_INT_EN |
 225                EBDMA_CSR_EN_CNT |
 226                EBDMA_CSR_BURST_SZ_16 |
 227                EBDMA_CSR_EN_NEXT);
 228
 229         if (write)
 230                 csr |= EBDMA_CSR_WRITE;
 231         if (p->flags & EBUS_DMA_FLAG_TCI_DISABLE)
 232                 csr |= EBDMA_CSR_TCI_DIS;
 233
 234         writel(csr, p->regs + EBDMA_CSR);
 235
 236         spin_unlock_irqrestore(&p->lock, flags);
 237 }
 238 EXPORT_SYMBOL(ebus_dma_prepare);
 239
 240 unsigned int ebus_dma_residue(struct ebus_dma_info *p)
 241 {
 242         return readl(p->regs + EBDMA_COUNT);
 243 }
 244 EXPORT_SYMBOL(ebus_dma_residue);
 245
 246 unsigned int ebus_dma_addr(struct ebus_dma_info *p)
 247 {
 248         return readl(p->regs + EBDMA_ADDR);
 249 }
 250 EXPORT_SYMBOL(ebus_dma_addr);
 251
 252 void ebus_dma_enable(struct ebus_dma_info *p, int on)
 253 {
 254         unsigned long flags;
 255         u32 orig_csr, csr;
 256
 257         spin_lock_irqsave(&p->lock, flags);
 258         orig_csr = csr = readl(p->regs + EBDMA_CSR);
 259         if (on)
 260                 csr |= EBDMA_CSR_EN_DMA;
 261         else
 262                 csr &= ~EBDMA_CSR_EN_DMA;
 263         if ((orig_csr & EBDMA_CSR_EN_DMA) !=
 264             (csr & EBDMA_CSR_EN_DMA))
 265                 writel(csr, p->regs + EBDMA_CSR);
 266         spin_unlock_irqrestore(&p->lock, flags);
 267 }
 268 EXPORT_SYMBOL(ebus_dma_enable);
 269
 270 struct linux_ebus *ebus_chain = NULL;
 271
 272 #ifdef CONFIG_SUN_AUXIO
 273 extern void auxio_probe(void);
 274 #endif
 275
 276 static inline void *ebus_alloc(size_t size)
 277 {
 278         void *mem;
 279
 280         mem = kzalloc(size, GFP_ATOMIC);
 281         if (!mem)
 282                 panic("ebus_alloc: out of memory");
 283         return mem;
 284 }
 285
 286 int __init ebus_intmap_match(struct linux_ebus *ebus,
 287                              struct linux_prom_registers *reg,
 288                              int *interrupt)
 289 {
 290         struct linux_prom_ebus_intmap *imap;
 291         struct linux_prom_ebus_intmask *imask;
 292         unsigned int hi, lo, irq;
 293         int i, len, n_imap;
 294
 295         imap = of_get_property(ebus->prom_node, "interrupt-map", &len);
 296         if (!imap)
 297                 return 0;
 298         n_imap = len / sizeof(imap[0]);
 299
 300         imask = of_get_property(ebus->prom_node, "interrupt-map-mask", NULL);
 301         if (!imask)
 302                 return 0;
 303
 304         hi = reg->which_io & imask->phys_hi;
 305         lo = reg->phys_addr & imask->phys_lo;
 306         irq = *interrupt & imask->interrupt;
 307         for (i = 0; i < n_imap; i++) {
 308                 if ((imap[i].phys_hi == hi) &&
 309                     (imap[i].phys_lo == lo) &&
 310                     (imap[i].interrupt == irq)) {
 311                         *interrupt = imap[i].cinterrupt;
 312                         return 0;
 313                 }
 314         }
 315         return -1;
 316 }
 317
 318 void __init fill_ebus_child(struct device_node *dp,
 319                             struct linux_prom_registers *preg,
 320                             struct linux_ebus_child *dev,
 321                             int non_standard_regs)
 322 {
 323         int *regs;
 324         int *irqs;
 325         int i, len;
 326
 327         dev->prom_node = dp;
 328         printk(" (%s)", dp->name);
 329
 330         regs = of_get_property(dp, "reg", &len);
 331         if (!regs)
 332                 dev->num_addrs = 0;
 333         else
 334                 dev->num_addrs = len / sizeof(regs[0]);
 335
 336         if (non_standard_regs) {
 337                 /* This is to handle reg properties which are not
 338                  * in the parent relative format.  One example are
 339                  * children of the i2c device on CompactPCI systems.
 340                  *
 341                  * So, for such devices we just record the property
 342                  * raw in the child resources.
 343                  */
 344                 for (i = 0; i < dev->num_addrs; i++)
 345                         dev->resource[i].start = regs[i];
 346         } else {
 347                 for (i = 0; i < dev->num_addrs; i++) {
 348                         int rnum = regs[i];
 349                         if (rnum >= dev->parent->num_addrs) {
 350                                 prom_printf("UGH: property for %s was %d, need < %d\n",
 351                                             dp->name, len, dev->parent->num_addrs);
 352                                 prom_halt();
 353                         }
 354                         dev->resource[i].start = dev->parent->resource[i].start;
 355                         dev->resource[i].end = dev->parent->resource[i].end;
 356                         dev->resource[i].flags = IORESOURCE_MEM;
 357                         dev->resource[i].name = dp->name;
 358                 }
 359         }
 360
 361         for (i = 0; i < PROMINTR_MAX; i++)
 362                 dev->irqs[i] = PCI_IRQ_NONE;
 363
 364         irqs = of_get_property(dp, "interrupts", &len);
 365         if (!irqs) {
 366                 dev->num_irqs = 0;
 367                 /*
 368                  * Oh, well, some PROMs don't export interrupts
 369                  * property to children of EBus devices...
 370                  *
 371                  * Be smart about PS/2 keyboard and mouse.
 372                  */
 373                 if (!strcmp(dev->parent->prom_node->name, "8042")) {
 374                         if (!strcmp(dev->prom_node->name, "kb_ps2")) {
 375                                 dev->num_irqs = 1;
 376                                 dev->irqs[0] = dev->parent->irqs[0];
 377                         } else {
 378                                 dev->num_irqs = 1;
 379                                 dev->irqs[0] = dev->parent->irqs[1];
 380                         }
 381                 }
 382         } else {
 383                 dev->num_irqs = len / sizeof(irqs[0]);
 384                 for (i = 0; i < dev->num_irqs; i++) {
 385                         struct pci_pbm_info *pbm = dev->bus->parent;
 386                         struct pci_controller_info *p = pbm->parent;
 387
 388                         if (ebus_intmap_match(dev->bus, preg, &irqs[i]) != -1) {
 389                                 dev->irqs[i] = p->irq_build(pbm,
 390                                                             dev->bus->self,
 391                                                             irqs[i]);
 392                         } else {
 393                                 /* If we get a bogus interrupt property, just
 394                                  * record the raw value instead of punting.
 395                                  */
 396                                 dev->irqs[i] = irqs[i];
 397                         }
 398                 }
 399         }
 400 }
 401
 402 static int __init child_regs_nonstandard(struct linux_ebus_device *dev)
 403 {
 404         if (!strcmp(dev->prom_node->name, "i2c") ||
 405             !strcmp(dev->prom_node->name, "SUNW,lombus"))
 406                 return 1;
 407         return 0;
 408 }
 409
 410 void __init fill_ebus_device(struct device_node *dp, struct linux_ebus_device *dev)
 411 {
 412         struct linux_prom_registers *regs;
 413         struct linux_ebus_child *child;
 414         int *irqs;
 415         int i, n, len;
 416
 417         dev->prom_node = dp;
 418
 419         printk(" [%s", dp->name);
 420
 421         regs = of_get_property(dp, "reg", &len);
 422         if (!regs) {
 423                 dev->num_addrs = 0;
 424                 goto probe_interrupts;
 425         }
 426
 427         if (len % sizeof(struct linux_prom_registers)) {
 428                 prom_printf("UGH: proplen for %s was %d, need multiple of %d\n",
 429                             dev->prom_node->name, len,
 430                             (int)sizeof(struct linux_prom_registers));
 431                 prom_halt();
 432         }
 433         dev->num_addrs = len / sizeof(struct linux_prom_registers);
 434
 435         for (i = 0; i < dev->num_addrs; i++) {
 436                 /* XXX Learn how to interpret ebus ranges... -DaveM */
 437                 if (regs[i].which_io >= 0x10)
 438                         n = (regs[i].which_io - 0x10) >> 2;
 439                 else
 440                         n = regs[i].which_io;
 441
 442                 dev->resource[i].start  = dev->bus->self->resource[n].start;
 443                 dev->resource[i].start += (unsigned long)regs[i].phys_addr;
 444                 dev->resource[i].end    =
 445                         (dev->resource[i].start + (unsigned long)regs[i].reg_size - 1UL);
 446                 dev->resource[i].flags  = IORESOURCE_MEM;
 447                 dev->resource[i].name   = dev->prom_node->name;
 448                 request_resource(&dev->bus->self->resource[n],
 449                                  &dev->resource[i]);
 450         }
 451
 452 probe_interrupts:
 453         for (i = 0; i < PROMINTR_MAX; i++)
 454                 dev->irqs[i] = PCI_IRQ_NONE;
 455
 456         irqs = of_get_property(dp, "interrupts", &len);
 457         if (!irqs) {
 458                 dev->num_irqs = 0;
 459         } else {
 460                 dev->num_irqs = len / sizeof(irqs[0]);
 461                 for (i = 0; i < dev->num_irqs; i++) {
 462                         struct pci_pbm_info *pbm = dev->bus->parent;
 463                         struct pci_controller_info *p = pbm->parent;
 464
 465                         if (ebus_intmap_match(dev->bus, &regs[0], &irqs[i]) != -1) {
 466                                 dev->irqs[i] = p->irq_build(pbm,
 467                                                             dev->bus->self,
 468                                                             irqs[i]);
 469                         } else {
 470                                 /* If we get a bogus interrupt property, just
 471                                  * record the raw value instead of punting.
 472                                  */
 473                                 dev->irqs[i] = irqs[i];
 474                         }
 475                 }
 476         }
 477
 478         dev->ofdev.node = dp;
 479         dev->ofdev.dev.parent = &dev->bus->ofdev.dev;
 480         dev->ofdev.dev.bus = &ebus_bus_type;
 481         strcpy(dev->ofdev.dev.bus_id, dp->path_component_name);
 482
 483         /* Register with core */
 484         if (of_device_register(&dev->ofdev) != 0)
 485                 printk(KERN_DEBUG "ebus: device registration error for %s!\n",
 486                        dev->ofdev.dev.bus_id);
 487
 488         dp = dp->child;
 489         if (dp) {
 490                 printk(" ->");
 491                 dev->children = ebus_alloc(sizeof(struct linux_ebus_child));
 492
 493                 child = dev->children;
 494                 child->next = NULL;
 495                 child->parent = dev;
 496                 child->bus = dev->bus;
 497                 fill_ebus_child(dp, regs, child,
 498                                 child_regs_nonstandard(dev));
 499
 500                 while ((dp = dp->sibling) != NULL) {
 501                         child->next = ebus_alloc(sizeof(struct linux_ebus_child));
 502
 503                         child = child->next;
 504                         child->next = NULL;
 505                         child->parent = dev;
 506                         child->bus = dev->bus;
 507                         fill_ebus_child(dp, regs, child,
 508                                         child_regs_nonstandard(dev));
 509                 }
 510         }
 511         printk("]");
 512 }
 513
 514 static struct pci_dev *find_next_ebus(struct pci_dev *start, int *is_rio_p)
 515 {
 516         struct pci_dev *pdev = start;
 517
 518         while ((pdev = pci_get_device(PCI_VENDOR_ID_SUN, PCI_ANY_ID, pdev)))
 519                 if (pdev->device == PCI_DEVICE_ID_SUN_EBUS ||
 520                         pdev->device == PCI_DEVICE_ID_SUN_RIO_EBUS)
 521                         break;
 522
 523         *is_rio_p = !!(pdev && (pdev->device == PCI_DEVICE_ID_SUN_RIO_EBUS));
 524
 525         return pdev;
 526 }
 527
 528 void __init ebus_init(void)
 529 {
 530         struct pci_pbm_info *pbm;
 531         struct linux_ebus_device *dev;
 532         struct linux_ebus *ebus;
 533         struct pci_dev *pdev;
 534         struct pcidev_cookie *cookie;
 535         struct device_node *dp;
 536         int is_rio;
 537         int num_ebus = 0;
 538
 539         pdev = find_next_ebus(NULL, &is_rio);
 540         if (!pdev) {
 541                 printk("ebus: No EBus's found.\n");
 542                 return;
 543         }
 544
 545         cookie = pdev->sysdata;
 546         dp = cookie->prom_node;
 547
 548         ebus_chain = ebus = ebus_alloc(sizeof(struct linux_ebus));
 549         ebus->next = NULL;
 550         ebus->is_rio = is_rio;
 551
 552         while (dp) {
 553                 struct device_node *child;
 554
 555                 /* SUNW,pci-qfe uses four empty ebuses on it.
 556                    I think we should not consider them here,
 557                    as they have half of the properties this
 558                    code expects and once we do PCI hot-plug,
 559                    we'd have to tweak with the ebus_chain
 560                    in the runtime after initialization. -jj */
 561                 if (!dp->child) {
 562                         pdev = find_next_ebus(pdev, &is_rio);
 563                         if (!pdev) {
 564                                 if (ebus == ebus_chain) {
 565                                         ebus_chain = NULL;
 566                                         printk("ebus: No EBus's found.\n");
 567                                         return;
 568                                 }
 569                                 break;
 570                         }
 571                         ebus->is_rio = is_rio;
 572                         cookie = pdev->sysdata;
 573                         dp = cookie->prom_node;
 574                         continue;
 575                 }
 576                 printk("ebus%d:", num_ebus);
 577
 578                 ebus->index = num_ebus;
 579                 ebus->prom_node = dp;
 580                 ebus->self = pdev;
 581                 ebus->parent = pbm = cookie->pbm;
 582
 583                 ebus->ofdev.node = dp;
 584                 ebus->ofdev.dev.parent = &pdev->dev;
 585                 ebus->ofdev.dev.bus = &ebus_bus_type;
 586                 strcpy(ebus->ofdev.dev.bus_id, dp->path_component_name);
 587
 588                 /* Register with core */
 589                 if (of_device_register(&ebus->ofdev) != 0)
 590                         printk(KERN_DEBUG "ebus: device registration error for %s!\n",
 591                                ebus->ofdev.dev.bus_id);
 592
 593
 594                 child = dp->child;
 595                 if (!child)
 596                         goto next_ebus;
 597
 598                 ebus->devices = ebus_alloc(sizeof(struct linux_ebus_device));
 599
 600                 dev = ebus->devices;
 601                 dev->next = NULL;
 602                 dev->children = NULL;
 603                 dev->bus = ebus;
 604                 fill_ebus_device(child, dev);
 605
 606                 while ((child = child->sibling) != NULL) {
 607                         dev->next = ebus_alloc(sizeof(struct linux_ebus_device));
 608
 609                         dev = dev->next;
 610                         dev->next = NULL;
 611                         dev->children = NULL;
 612                         dev->bus = ebus;
 613                         fill_ebus_device(child, dev);
 614                 }
 615
 616         next_ebus:
 617                 printk("\n");
 618
 619                 pdev = find_next_ebus(pdev, &is_rio);
 620                 if (!pdev)
 621                         break;
 622
 623                 cookie = pdev->sysdata;
 624                 dp = cookie->prom_node;
 625
 626                 ebus->next = ebus_alloc(sizeof(struct linux_ebus));
 627                 ebus = ebus->next;
 628                 ebus->next = NULL;
 629                 ebus->is_rio = is_rio;
 630                 ++num_ebus;
 631         }
 632         pci_dev_put(pdev); /* XXX for the case, when ebusnd is 0, is it OK? */
 633
 634 #ifdef CONFIG_SUN_AUXIO
 635         auxio_probe();
 636 #endif
 637 }