git.oblomov.eu Git - linux-2.6/blob - drivers/ssb/main.c

   1 /*
   2  * Sonics Silicon Backplane
   3  * Subsystem core
   4  *
   5  * Copyright 2005, Broadcom Corporation
   6  * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de>
   7  *
   8  * Licensed under the GNU/GPL. See COPYING for details.
   9  */
  10
  11 #include "ssb_private.h"
  12
  13 #include <linux/delay.h>
  14 #include <linux/io.h>
  15 #include <linux/ssb/ssb.h>
  16 #include <linux/ssb/ssb_regs.h>
  17 #include <linux/ssb/ssb_driver_gige.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/pci.h>
  20
  21 #include <pcmcia/cs_types.h>
  22 #include <pcmcia/cs.h>
  23 #include <pcmcia/cistpl.h>
  24 #include <pcmcia/ds.h>
  25
  26
  27 MODULE_DESCRIPTION("Sonics Silicon Backplane driver");
  28 MODULE_LICENSE("GPL");
  29
  30
  31 /* Temporary list of yet-to-be-attached buses */
  32 static LIST_HEAD(attach_queue);
  33 /* List if running buses */
  34 static LIST_HEAD(buses);
  35 /* Software ID counter */
  36 static unsigned int next_busnumber;
  37 /* buses_mutes locks the two buslists and the next_busnumber.
  38  * Don't lock this directly, but use ssb_buses_[un]lock() below. */
  39 static DEFINE_MUTEX(buses_mutex);
  40
  41 /* There are differences in the codeflow, if the bus is
  42  * initialized from early boot, as various needed services
  43  * are not available early. This is a mechanism to delay
  44  * these initializations to after early boot has finished.
  45  * It's also used to avoid mutex locking, as that's not
  46  * available and needed early. */
  47 static bool ssb_is_early_boot = 1;
  48
  49 static void ssb_buses_lock(void);
  50 static void ssb_buses_unlock(void);
  51
  52
  53 #ifdef CONFIG_SSB_PCIHOST
  54 struct ssb_bus *ssb_pci_dev_to_bus(struct pci_dev *pdev)
  55 {
  56         struct ssb_bus *bus;
  57
  58         ssb_buses_lock();
  59         list_for_each_entry(bus, &buses, list) {
  60                 if (bus->bustype == SSB_BUSTYPE_PCI &&
  61                     bus->host_pci == pdev)
  62                         goto found;
  63         }
  64         bus = NULL;
  65 found:
  66         ssb_buses_unlock();
  67
  68         return bus;
  69 }
  70 #endif /* CONFIG_SSB_PCIHOST */
  71
  72 #ifdef CONFIG_SSB_PCMCIAHOST
  73 struct ssb_bus *ssb_pcmcia_dev_to_bus(struct pcmcia_device *pdev)
  74 {
  75         struct ssb_bus *bus;
  76
  77         ssb_buses_lock();
  78         list_for_each_entry(bus, &buses, list) {
  79                 if (bus->bustype == SSB_BUSTYPE_PCMCIA &&
  80                     bus->host_pcmcia == pdev)
  81                         goto found;
  82         }
  83         bus = NULL;
  84 found:
  85         ssb_buses_unlock();
  86
  87         return bus;
  88 }
  89 #endif /* CONFIG_SSB_PCMCIAHOST */
  90
  91 int ssb_for_each_bus_call(unsigned long data,
  92                           int (*func)(struct ssb_bus *bus, unsigned long data))
  93 {
  94         struct ssb_bus *bus;
  95         int res;
  96
  97         ssb_buses_lock();
  98         list_for_each_entry(bus, &buses, list) {
  99                 res = func(bus, data);
 100                 if (res >= 0) {
 101                         ssb_buses_unlock();
 102                         return res;
 103                 }
 104         }
 105         ssb_buses_unlock();
 106
 107         return -ENODEV;
 108 }
 109
 110 static struct ssb_device *ssb_device_get(struct ssb_device *dev)
 111 {
 112         if (dev)
 113                 get_device(dev->dev);
 114         return dev;
 115 }
 116
 117 static void ssb_device_put(struct ssb_device *dev)
 118 {
 119         if (dev)
 120                 put_device(dev->dev);
 121 }
 122
 123 static int ssb_device_resume(struct device *dev)
 124 {
 125         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 126         struct ssb_driver *ssb_drv;
 127         int err = 0;
 128
 129         if (dev->driver) {
 130                 ssb_drv = drv_to_ssb_drv(dev->driver);
 131                 if (ssb_drv && ssb_drv->resume)
 132                         err = ssb_drv->resume(ssb_dev);
 133                 if (err)
 134                         goto out;
 135         }
 136 out:
 137         return err;
 138 }
 139
 140 static int ssb_device_suspend(struct device *dev, pm_message_t state)
 141 {
 142         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 143         struct ssb_driver *ssb_drv;
 144         int err = 0;
 145
 146         if (dev->driver) {
 147                 ssb_drv = drv_to_ssb_drv(dev->driver);
 148                 if (ssb_drv && ssb_drv->suspend)
 149                         err = ssb_drv->suspend(ssb_dev, state);
 150                 if (err)
 151                         goto out;
 152         }
 153 out:
 154         return err;
 155 }
 156
 157 int ssb_bus_resume(struct ssb_bus *bus)
 158 {
 159         int err;
 160
 161         /* Reset HW state information in memory, so that HW is
 162          * completely reinitialized. */
 163         bus->mapped_device = NULL;
 164 #ifdef CONFIG_SSB_DRIVER_PCICORE
 165         bus->pcicore.setup_done = 0;
 166 #endif
 167
 168         err = ssb_bus_powerup(bus, 0);
 169         if (err)
 170                 return err;
 171         err = ssb_pcmcia_hardware_setup(bus);
 172         if (err) {
 173                 ssb_bus_may_powerdown(bus);
 174                 return err;
 175         }
 176         ssb_chipco_resume(&bus->chipco);
 177         ssb_bus_may_powerdown(bus);
 178
 179         return 0;
 180 }
 181 EXPORT_SYMBOL(ssb_bus_resume);
 182
 183 int ssb_bus_suspend(struct ssb_bus *bus)
 184 {
 185         ssb_chipco_suspend(&bus->chipco);
 186         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
 187
 188         return 0;
 189 }
 190 EXPORT_SYMBOL(ssb_bus_suspend);
 191
 192 #ifdef CONFIG_SSB_SPROM
 193 int ssb_devices_freeze(struct ssb_bus *bus)
 194 {
 195         struct ssb_device *dev;
 196         struct ssb_driver *drv;
 197         int err = 0;
 198         int i;
 199         pm_message_t state = PMSG_FREEZE;
 200
 201         /* First check that we are capable to freeze all devices. */
 202         for (i = 0; i < bus->nr_devices; i++) {
 203                 dev = &(bus->devices[i]);
 204                 if (!dev->dev ||
 205                     !dev->dev->driver ||
 206                     !device_is_registered(dev->dev))
 207                         continue;
 208                 drv = drv_to_ssb_drv(dev->dev->driver);
 209                 if (!drv)
 210                         continue;
 211                 if (!drv->suspend) {
 212                         /* Nope, can't suspend this one. */
 213                         return -EOPNOTSUPP;
 214                 }
 215         }
 216         /* Now suspend all devices */
 217         for (i = 0; i < bus->nr_devices; i++) {
 218                 dev = &(bus->devices[i]);
 219                 if (!dev->dev ||
 220                     !dev->dev->driver ||
 221                     !device_is_registered(dev->dev))
 222                         continue;
 223                 drv = drv_to_ssb_drv(dev->dev->driver);
 224                 if (!drv)
 225                         continue;
 226                 err = drv->suspend(dev, state);
 227                 if (err) {
 228                         ssb_printk(KERN_ERR PFX "Failed to freeze device %s\n",
 229                                    dev->dev->bus_id);
 230                         goto err_unwind;
 231                 }
 232         }
 233
 234         return 0;
 235 err_unwind:
 236         for (i--; i >= 0; i--) {
 237                 dev = &(bus->devices[i]);
 238                 if (!dev->dev ||
 239                     !dev->dev->driver ||
 240                     !device_is_registered(dev->dev))
 241                         continue;
 242                 drv = drv_to_ssb_drv(dev->dev->driver);
 243                 if (!drv)
 244                         continue;
 245                 if (drv->resume)
 246                         drv->resume(dev);
 247         }
 248         return err;
 249 }
 250
 251 int ssb_devices_thaw(struct ssb_bus *bus)
 252 {
 253         struct ssb_device *dev;
 254         struct ssb_driver *drv;
 255         int err;
 256         int i;
 257
 258         for (i = 0; i < bus->nr_devices; i++) {
 259                 dev = &(bus->devices[i]);
 260                 if (!dev->dev ||
 261                     !dev->dev->driver ||
 262                     !device_is_registered(dev->dev))
 263                         continue;
 264                 drv = drv_to_ssb_drv(dev->dev->driver);
 265                 if (!drv)
 266                         continue;
 267                 if (SSB_WARN_ON(!drv->resume))
 268                         continue;
 269                 err = drv->resume(dev);
 270                 if (err) {
 271                         ssb_printk(KERN_ERR PFX "Failed to thaw device %s\n",
 272                                    dev->dev->bus_id);
 273                 }
 274         }
 275
 276         return 0;
 277 }
 278 #endif /* CONFIG_SSB_SPROM */
 279
 280 static void ssb_device_shutdown(struct device *dev)
 281 {
 282         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 283         struct ssb_driver *ssb_drv;
 284
 285         if (!dev->driver)
 286                 return;
 287         ssb_drv = drv_to_ssb_drv(dev->driver);
 288         if (ssb_drv && ssb_drv->shutdown)
 289                 ssb_drv->shutdown(ssb_dev);
 290 }
 291
 292 static int ssb_device_remove(struct device *dev)
 293 {
 294         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 295         struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
 296
 297         if (ssb_drv && ssb_drv->remove)
 298                 ssb_drv->remove(ssb_dev);
 299         ssb_device_put(ssb_dev);
 300
 301         return 0;
 302 }
 303
 304 static int ssb_device_probe(struct device *dev)
 305 {
 306         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 307         struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
 308         int err = 0;
 309
 310         ssb_device_get(ssb_dev);
 311         if (ssb_drv && ssb_drv->probe)
 312                 err = ssb_drv->probe(ssb_dev, &ssb_dev->id);
 313         if (err)
 314                 ssb_device_put(ssb_dev);
 315
 316         return err;
 317 }
 318
 319 static int ssb_match_devid(const struct ssb_device_id *tabid,
 320                            const struct ssb_device_id *devid)
 321 {
 322         if ((tabid->vendor != devid->vendor) &&
 323             tabid->vendor != SSB_ANY_VENDOR)
 324                 return 0;
 325         if ((tabid->coreid != devid->coreid) &&
 326             tabid->coreid != SSB_ANY_ID)
 327                 return 0;
 328         if ((tabid->revision != devid->revision) &&
 329             tabid->revision != SSB_ANY_REV)
 330                 return 0;
 331         return 1;
 332 }
 333
 334 static int ssb_bus_match(struct device *dev, struct device_driver *drv)
 335 {
 336         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 337         struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv);
 338         const struct ssb_device_id *id;
 339
 340         for (id = ssb_drv->id_table;
 341              id->vendor || id->coreid || id->revision;
 342              id++) {
 343                 if (ssb_match_devid(id, &ssb_dev->id))
 344                         return 1; /* found */
 345         }
 346
 347         return 0;
 348 }
 349
 350 static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 351 {
 352         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 353
 354         if (!dev)
 355                 return -ENODEV;
 356
 357         return add_uevent_var(env,
 358                              "MODALIAS=ssb:v%04Xid%04Xrev%02X",
 359                              ssb_dev->id.vendor, ssb_dev->id.coreid,
 360                              ssb_dev->id.revision);
 361 }
 362
 363 static struct bus_type ssb_bustype = {
 364         .name           = "ssb",
 365         .match          = ssb_bus_match,
 366         .probe          = ssb_device_probe,
 367         .remove         = ssb_device_remove,
 368         .shutdown       = ssb_device_shutdown,
 369         .suspend        = ssb_device_suspend,
 370         .resume         = ssb_device_resume,
 371         .uevent         = ssb_device_uevent,
 372 };
 373
 374 static void ssb_buses_lock(void)
 375 {
 376         /* See the comment at the ssb_is_early_boot definition */
 377         if (!ssb_is_early_boot)
 378                 mutex_lock(&buses_mutex);
 379 }
 380
 381 static void ssb_buses_unlock(void)
 382 {
 383         /* See the comment at the ssb_is_early_boot definition */
 384         if (!ssb_is_early_boot)
 385                 mutex_unlock(&buses_mutex);
 386 }
 387
 388 static void ssb_devices_unregister(struct ssb_bus *bus)
 389 {
 390         struct ssb_device *sdev;
 391         int i;
 392
 393         for (i = bus->nr_devices - 1; i >= 0; i--) {
 394                 sdev = &(bus->devices[i]);
 395                 if (sdev->dev)
 396                         device_unregister(sdev->dev);
 397         }
 398 }
 399
 400 void ssb_bus_unregister(struct ssb_bus *bus)
 401 {
 402         ssb_buses_lock();
 403         ssb_devices_unregister(bus);
 404         list_del(&bus->list);
 405         ssb_buses_unlock();
 406
 407         ssb_pcmcia_exit(bus);
 408         ssb_pci_exit(bus);
 409         ssb_iounmap(bus);
 410 }
 411 EXPORT_SYMBOL(ssb_bus_unregister);
 412
 413 static void ssb_release_dev(struct device *dev)
 414 {
 415         struct __ssb_dev_wrapper *devwrap;
 416
 417         devwrap = container_of(dev, struct __ssb_dev_wrapper, dev);
 418         kfree(devwrap);
 419 }
 420
 421 static int ssb_devices_register(struct ssb_bus *bus)
 422 {
 423         struct ssb_device *sdev;
 424         struct device *dev;
 425         struct __ssb_dev_wrapper *devwrap;
 426         int i, err = 0;
 427         int dev_idx = 0;
 428
 429         for (i = 0; i < bus->nr_devices; i++) {
 430                 sdev = &(bus->devices[i]);
 431
 432                 /* We don't register SSB-system devices to the kernel,
 433                  * as the drivers for them are built into SSB. */
 434                 switch (sdev->id.coreid) {
 435                 case SSB_DEV_CHIPCOMMON:
 436                 case SSB_DEV_PCI:
 437                 case SSB_DEV_PCIE:
 438                 case SSB_DEV_PCMCIA:
 439                 case SSB_DEV_MIPS:
 440                 case SSB_DEV_MIPS_3302:
 441                 case SSB_DEV_EXTIF:
 442                         continue;
 443                 }
 444
 445                 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL);
 446                 if (!devwrap) {
 447                         ssb_printk(KERN_ERR PFX
 448                                    "Could not allocate device\n");
 449                         err = -ENOMEM;
 450                         goto error;
 451                 }
 452                 dev = &devwrap->dev;
 453                 devwrap->sdev = sdev;
 454
 455                 dev->release = ssb_release_dev;
 456                 dev->bus = &ssb_bustype;
 457                 snprintf(dev->bus_id, sizeof(dev->bus_id),
 458                          "ssb%u:%d", bus->busnumber, dev_idx);
 459
 460                 switch (bus->bustype) {
 461                 case SSB_BUSTYPE_PCI:
 462 #ifdef CONFIG_SSB_PCIHOST
 463                         sdev->irq = bus->host_pci->irq;
 464                         dev->parent = &bus->host_pci->dev;
 465                         sdev->dma_dev = &bus->host_pci->dev;
 466 #endif
 467                         break;
 468                 case SSB_BUSTYPE_PCMCIA:
 469 #ifdef CONFIG_SSB_PCMCIAHOST
 470                         sdev->irq = bus->host_pcmcia->irq.AssignedIRQ;
 471                         dev->parent = &bus->host_pcmcia->dev;
 472                         sdev->dma_dev = &bus->host_pcmcia->dev;
 473 #endif
 474                         break;
 475                 case SSB_BUSTYPE_SSB:
 476                         sdev->dma_dev = dev;
 477                         break;
 478                 }
 479
 480                 sdev->dev = dev;
 481                 err = device_register(dev);
 482                 if (err) {
 483                         ssb_printk(KERN_ERR PFX
 484                                    "Could not register %s\n",
 485                                    dev->bus_id);
 486                         /* Set dev to NULL to not unregister
 487                          * dev on error unwinding. */
 488                         sdev->dev = NULL;
 489                         kfree(devwrap);
 490                         goto error;
 491                 }
 492                 dev_idx++;
 493         }
 494
 495         return 0;
 496 error:
 497         /* Unwind the already registered devices. */
 498         ssb_devices_unregister(bus);
 499         return err;
 500 }
 501
 502 /* Needs ssb_buses_lock() */
 503 static int ssb_attach_queued_buses(void)
 504 {
 505         struct ssb_bus *bus, *n;
 506         int err = 0;
 507         int drop_them_all = 0;
 508
 509         list_for_each_entry_safe(bus, n, &attach_queue, list) {
 510                 if (drop_them_all) {
 511                         list_del(&bus->list);
 512                         continue;
 513                 }
 514                 /* Can't init the PCIcore in ssb_bus_register(), as that
 515                  * is too early in boot for embedded systems
 516                  * (no udelay() available). So do it here in attach stage.
 517                  */
 518                 err = ssb_bus_powerup(bus, 0);
 519                 if (err)
 520                         goto error;
 521                 ssb_pcicore_init(&bus->pcicore);
 522                 ssb_bus_may_powerdown(bus);
 523
 524                 err = ssb_devices_register(bus);
 525 error:
 526                 if (err) {
 527                         drop_them_all = 1;
 528                         list_del(&bus->list);
 529                         continue;
 530                 }
 531                 list_move_tail(&bus->list, &buses);
 532         }
 533
 534         return err;
 535 }
 536
 537 static u8 ssb_ssb_read8(struct ssb_device *dev, u16 offset)
 538 {
 539         struct ssb_bus *bus = dev->bus;
 540
 541         offset += dev->core_index * SSB_CORE_SIZE;
 542         return readb(bus->mmio + offset);
 543 }
 544
 545 static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset)
 546 {
 547         struct ssb_bus *bus = dev->bus;
 548
 549         offset += dev->core_index * SSB_CORE_SIZE;
 550         return readw(bus->mmio + offset);
 551 }
 552
 553 static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
 554 {
 555         struct ssb_bus *bus = dev->bus;
 556
 557         offset += dev->core_index * SSB_CORE_SIZE;
 558         return readl(bus->mmio + offset);
 559 }
 560
 561 #ifdef CONFIG_SSB_BLOCKIO
 562 static void ssb_ssb_block_read(struct ssb_device *dev, void *buffer,
 563                                size_t count, u16 offset, u8 reg_width)
 564 {
 565         struct ssb_bus *bus = dev->bus;
 566         void __iomem *addr;
 567
 568         offset += dev->core_index * SSB_CORE_SIZE;
 569         addr = bus->mmio + offset;
 570
 571         switch (reg_width) {
 572         case sizeof(u8): {
 573                 u8 *buf = buffer;
 574
 575                 while (count) {
 576                         *buf = __raw_readb(addr);
 577                         buf++;
 578                         count--;
 579                 }
 580                 break;
 581         }
 582         case sizeof(u16): {
 583                 __le16 *buf = buffer;
 584
 585                 SSB_WARN_ON(count & 1);
 586                 while (count) {
 587                         *buf = (__force __le16)__raw_readw(addr);
 588                         buf++;
 589                         count -= 2;
 590                 }
 591                 break;
 592         }
 593         case sizeof(u32): {
 594                 __le32 *buf = buffer;
 595
 596                 SSB_WARN_ON(count & 3);
 597                 while (count) {
 598                         *buf = (__force __le32)__raw_readl(addr);
 599                         buf++;
 600                         count -= 4;
 601                 }
 602                 break;
 603         }
 604         default:
 605                 SSB_WARN_ON(1);
 606         }
 607 }
 608 #endif /* CONFIG_SSB_BLOCKIO */
 609
 610 static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
 611 {
 612         struct ssb_bus *bus = dev->bus;
 613
 614         offset += dev->core_index * SSB_CORE_SIZE;
 615         writeb(value, bus->mmio + offset);
 616 }
 617
 618 static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
 619 {
 620         struct ssb_bus *bus = dev->bus;
 621
 622         offset += dev->core_index * SSB_CORE_SIZE;
 623         writew(value, bus->mmio + offset);
 624 }
 625
 626 static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
 627 {
 628         struct ssb_bus *bus = dev->bus;
 629
 630         offset += dev->core_index * SSB_CORE_SIZE;
 631         writel(value, bus->mmio + offset);
 632 }
 633
 634 #ifdef CONFIG_SSB_BLOCKIO
 635 static void ssb_ssb_block_write(struct ssb_device *dev, const void *buffer,
 636                                 size_t count, u16 offset, u8 reg_width)
 637 {
 638         struct ssb_bus *bus = dev->bus;
 639         void __iomem *addr;
 640
 641         offset += dev->core_index * SSB_CORE_SIZE;
 642         addr = bus->mmio + offset;
 643
 644         switch (reg_width) {
 645         case sizeof(u8): {
 646                 const u8 *buf = buffer;
 647
 648                 while (count) {
 649                         __raw_writeb(*buf, addr);
 650                         buf++;
 651                         count--;
 652                 }
 653                 break;
 654         }
 655         case sizeof(u16): {
 656                 const __le16 *buf = buffer;
 657
 658                 SSB_WARN_ON(count & 1);
 659                 while (count) {
 660                         __raw_writew((__force u16)(*buf), addr);
 661                         buf++;
 662                         count -= 2;
 663                 }
 664                 break;
 665         }
 666         case sizeof(u32): {
 667                 const __le32 *buf = buffer;
 668
 669                 SSB_WARN_ON(count & 3);
 670                 while (count) {
 671                         __raw_writel((__force u32)(*buf), addr);
 672                         buf++;
 673                         count -= 4;
 674                 }
 675                 break;
 676         }
 677         default:
 678                 SSB_WARN_ON(1);
 679         }
 680 }
 681 #endif /* CONFIG_SSB_BLOCKIO */
 682
 683 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
 684 static const struct ssb_bus_ops ssb_ssb_ops = {
 685         .read8          = ssb_ssb_read8,
 686         .read16         = ssb_ssb_read16,
 687         .read32         = ssb_ssb_read32,
 688         .write8         = ssb_ssb_write8,
 689         .write16        = ssb_ssb_write16,
 690         .write32        = ssb_ssb_write32,
 691 #ifdef CONFIG_SSB_BLOCKIO
 692         .block_read     = ssb_ssb_block_read,
 693         .block_write    = ssb_ssb_block_write,
 694 #endif
 695 };
 696
 697 static int ssb_fetch_invariants(struct ssb_bus *bus,
 698                                 ssb_invariants_func_t get_invariants)
 699 {
 700         struct ssb_init_invariants iv;
 701         int err;
 702
 703         memset(&iv, 0, sizeof(iv));
 704         err = get_invariants(bus, &iv);
 705         if (err)
 706                 goto out;
 707         memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
 708         memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
 709         bus->has_cardbus_slot = iv.has_cardbus_slot;
 710 out:
 711         return err;
 712 }
 713
 714 static int ssb_bus_register(struct ssb_bus *bus,
 715                             ssb_invariants_func_t get_invariants,
 716                             unsigned long baseaddr)
 717 {
 718         int err;
 719
 720         spin_lock_init(&bus->bar_lock);
 721         INIT_LIST_HEAD(&bus->list);
 722 #ifdef CONFIG_SSB_EMBEDDED
 723         spin_lock_init(&bus->gpio_lock);
 724 #endif
 725
 726         /* Powerup the bus */
 727         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
 728         if (err)
 729                 goto out;
 730         ssb_buses_lock();
 731         bus->busnumber = next_busnumber;
 732         /* Scan for devices (cores) */
 733         err = ssb_bus_scan(bus, baseaddr);
 734         if (err)
 735                 goto err_disable_xtal;
 736
 737         /* Init PCI-host device (if any) */
 738         err = ssb_pci_init(bus);
 739         if (err)
 740                 goto err_unmap;
 741         /* Init PCMCIA-host device (if any) */
 742         err = ssb_pcmcia_init(bus);
 743         if (err)
 744                 goto err_pci_exit;
 745
 746         /* Initialize basic system devices (if available) */
 747         err = ssb_bus_powerup(bus, 0);
 748         if (err)
 749                 goto err_pcmcia_exit;
 750         ssb_chipcommon_init(&bus->chipco);
 751         ssb_mipscore_init(&bus->mipscore);
 752         err = ssb_fetch_invariants(bus, get_invariants);
 753         if (err) {
 754                 ssb_bus_may_powerdown(bus);
 755                 goto err_pcmcia_exit;
 756         }
 757         ssb_bus_may_powerdown(bus);
 758
 759         /* Queue it for attach.
 760          * See the comment at the ssb_is_early_boot definition. */
 761         list_add_tail(&bus->list, &attach_queue);
 762         if (!ssb_is_early_boot) {
 763                 /* This is not early boot, so we must attach the bus now */
 764                 err = ssb_attach_queued_buses();
 765                 if (err)
 766                         goto err_dequeue;
 767         }
 768         next_busnumber++;
 769         ssb_buses_unlock();
 770
 771 out:
 772         return err;
 773
 774 err_dequeue:
 775         list_del(&bus->list);
 776 err_pcmcia_exit:
 777         ssb_pcmcia_exit(bus);
 778 err_pci_exit:
 779         ssb_pci_exit(bus);
 780 err_unmap:
 781         ssb_iounmap(bus);
 782 err_disable_xtal:
 783         ssb_buses_unlock();
 784         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
 785         return err;
 786 }
 787
 788 #ifdef CONFIG_SSB_PCIHOST
 789 int ssb_bus_pcibus_register(struct ssb_bus *bus,
 790                             struct pci_dev *host_pci)
 791 {
 792         int err;
 793
 794         bus->bustype = SSB_BUSTYPE_PCI;
 795         bus->host_pci = host_pci;
 796         bus->ops = &ssb_pci_ops;
 797
 798         err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
 799         if (!err) {
 800                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
 801                            "PCI device %s\n", host_pci->dev.bus_id);
 802         }
 803
 804         return err;
 805 }
 806 EXPORT_SYMBOL(ssb_bus_pcibus_register);
 807 #endif /* CONFIG_SSB_PCIHOST */
 808
 809 #ifdef CONFIG_SSB_PCMCIAHOST
 810 int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
 811                                struct pcmcia_device *pcmcia_dev,
 812                                unsigned long baseaddr)
 813 {
 814         int err;
 815
 816         bus->bustype = SSB_BUSTYPE_PCMCIA;
 817         bus->host_pcmcia = pcmcia_dev;
 818         bus->ops = &ssb_pcmcia_ops;
 819
 820         err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
 821         if (!err) {
 822                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
 823                            "PCMCIA device %s\n", pcmcia_dev->devname);
 824         }
 825
 826         return err;
 827 }
 828 EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
 829 #endif /* CONFIG_SSB_PCMCIAHOST */
 830
 831 int ssb_bus_ssbbus_register(struct ssb_bus *bus,
 832                             unsigned long baseaddr,
 833                             ssb_invariants_func_t get_invariants)
 834 {
 835         int err;
 836
 837         bus->bustype = SSB_BUSTYPE_SSB;
 838         bus->ops = &ssb_ssb_ops;
 839
 840         err = ssb_bus_register(bus, get_invariants, baseaddr);
 841         if (!err) {
 842                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found at "
 843                            "address 0x%08lX\n", baseaddr);
 844         }
 845
 846         return err;
 847 }
 848
 849 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
 850 {
 851         drv->drv.name = drv->name;
 852         drv->drv.bus = &ssb_bustype;
 853         drv->drv.owner = owner;
 854
 855         return driver_register(&drv->drv);
 856 }
 857 EXPORT_SYMBOL(__ssb_driver_register);
 858
 859 void ssb_driver_unregister(struct ssb_driver *drv)
 860 {
 861         driver_unregister(&drv->drv);
 862 }
 863 EXPORT_SYMBOL(ssb_driver_unregister);
 864
 865 void ssb_set_devtypedata(struct ssb_device *dev, void *data)
 866 {
 867         struct ssb_bus *bus = dev->bus;
 868         struct ssb_device *ent;
 869         int i;
 870
 871         for (i = 0; i < bus->nr_devices; i++) {
 872                 ent = &(bus->devices[i]);
 873                 if (ent->id.vendor != dev->id.vendor)
 874                         continue;
 875                 if (ent->id.coreid != dev->id.coreid)
 876                         continue;
 877
 878                 ent->devtypedata = data;
 879         }
 880 }
 881 EXPORT_SYMBOL(ssb_set_devtypedata);
 882
 883 static u32 clkfactor_f6_resolve(u32 v)
 884 {
 885         /* map the magic values */
 886         switch (v) {
 887         case SSB_CHIPCO_CLK_F6_2:
 888                 return 2;
 889         case SSB_CHIPCO_CLK_F6_3:
 890                 return 3;
 891         case SSB_CHIPCO_CLK_F6_4:
 892                 return 4;
 893         case SSB_CHIPCO_CLK_F6_5:
 894                 return 5;
 895         case SSB_CHIPCO_CLK_F6_6:
 896                 return 6;
 897         case SSB_CHIPCO_CLK_F6_7:
 898                 return 7;
 899         }
 900         return 0;
 901 }
 902
 903 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
 904 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
 905 {
 906         u32 n1, n2, clock, m1, m2, m3, mc;
 907
 908         n1 = (n & SSB_CHIPCO_CLK_N1);
 909         n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
 910
 911         switch (plltype) {
 912         case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
 913                 if (m & SSB_CHIPCO_CLK_T6_MMASK)
 914                         return SSB_CHIPCO_CLK_T6_M0;
 915                 return SSB_CHIPCO_CLK_T6_M1;
 916         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
 917         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
 918         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
 919         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
 920                 n1 = clkfactor_f6_resolve(n1);
 921                 n2 += SSB_CHIPCO_CLK_F5_BIAS;
 922                 break;
 923         case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
 924                 n1 += SSB_CHIPCO_CLK_T2_BIAS;
 925                 n2 += SSB_CHIPCO_CLK_T2_BIAS;
 926                 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
 927                 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
 928                 break;
 929         case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
 930                 return 100000000;
 931         default:
 932                 SSB_WARN_ON(1);
 933         }
 934
 935         switch (plltype) {
 936         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
 937         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
 938                 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
 939                 break;
 940         default:
 941                 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
 942         }
 943         if (!clock)
 944                 return 0;
 945
 946         m1 = (m & SSB_CHIPCO_CLK_M1);
 947         m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
 948         m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
 949         mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
 950
 951         switch (plltype) {
 952         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
 953         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
 954         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
 955         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
 956                 m1 = clkfactor_f6_resolve(m1);
 957                 if ((plltype == SSB_PLLTYPE_1) ||
 958                     (plltype == SSB_PLLTYPE_3))
 959                         m2 += SSB_CHIPCO_CLK_F5_BIAS;
 960                 else
 961                         m2 = clkfactor_f6_resolve(m2);
 962                 m3 = clkfactor_f6_resolve(m3);
 963
 964                 switch (mc) {
 965                 case SSB_CHIPCO_CLK_MC_BYPASS:
 966                         return clock;
 967                 case SSB_CHIPCO_CLK_MC_M1:
 968                         return (clock / m1);
 969                 case SSB_CHIPCO_CLK_MC_M1M2:
 970                         return (clock / (m1 * m2));
 971                 case SSB_CHIPCO_CLK_MC_M1M2M3:
 972                         return (clock / (m1 * m2 * m3));
 973                 case SSB_CHIPCO_CLK_MC_M1M3:
 974                         return (clock / (m1 * m3));
 975                 }
 976                 return 0;
 977         case SSB_PLLTYPE_2:
 978                 m1 += SSB_CHIPCO_CLK_T2_BIAS;
 979                 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
 980                 m3 += SSB_CHIPCO_CLK_T2_BIAS;
 981                 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
 982                 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
 983                 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
 984
 985                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
 986                         clock /= m1;
 987                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
 988                         clock /= m2;
 989                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
 990                         clock /= m3;
 991                 return clock;
 992         default:
 993                 SSB_WARN_ON(1);
 994         }
 995         return 0;
 996 }
 997
 998 /* Get the current speed the backplane is running at */
 999 u32 ssb_clockspeed(struct ssb_bus *bus)
1000 {
1001         u32 rate;
1002         u32 plltype;
1003         u32 clkctl_n, clkctl_m;
1004
1005         if (ssb_extif_available(&bus->extif))
1006                 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
1007                                            &clkctl_n, &clkctl_m);
1008         else if (bus->chipco.dev)
1009                 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
1010                                             &clkctl_n, &clkctl_m);
1011         else
1012                 return 0;
1013
1014         if (bus->chip_id == 0x5365) {
1015                 rate = 100000000;
1016         } else {
1017                 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
1018                 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
1019                         rate /= 2;
1020         }
1021
1022         return rate;
1023 }
1024 EXPORT_SYMBOL(ssb_clockspeed);
1025
1026 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
1027 {
1028         u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
1029
1030         /* The REJECT bit changed position in TMSLOW between
1031          * Backplane revisions. */
1032         switch (rev) {
1033         case SSB_IDLOW_SSBREV_22:
1034                 return SSB_TMSLOW_REJECT_22;
1035         case SSB_IDLOW_SSBREV_23:
1036                 return SSB_TMSLOW_REJECT_23;
1037         case SSB_IDLOW_SSBREV_24:     /* TODO - find the proper REJECT bits */
1038         case SSB_IDLOW_SSBREV_25:     /* same here */
1039         case SSB_IDLOW_SSBREV_26:     /* same here */
1040         case SSB_IDLOW_SSBREV_27:     /* same here */
1041                 return SSB_TMSLOW_REJECT_23;    /* this is a guess */
1042         default:
1043                 printk(KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
1044                 WARN_ON(1);
1045         }
1046         return (SSB_TMSLOW_REJECT_22 | SSB_TMSLOW_REJECT_23);
1047 }
1048
1049 int ssb_device_is_enabled(struct ssb_device *dev)
1050 {
1051         u32 val;
1052         u32 reject;
1053
1054         reject = ssb_tmslow_reject_bitmask(dev);
1055         val = ssb_read32(dev, SSB_TMSLOW);
1056         val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1057
1058         return (val == SSB_TMSLOW_CLOCK);
1059 }
1060 EXPORT_SYMBOL(ssb_device_is_enabled);
1061
1062 static void ssb_flush_tmslow(struct ssb_device *dev)
1063 {
1064         /* Make _really_ sure the device has finished the TMSLOW
1065          * register write transaction, as we risk running into
1066          * a machine check exception otherwise.
1067          * Do this by reading the register back to commit the
1068          * PCI write and delay an additional usec for the device
1069          * to react to the change. */
1070         ssb_read32(dev, SSB_TMSLOW);
1071         udelay(1);
1072 }
1073
1074 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1075 {
1076         u32 val;
1077
1078         ssb_device_disable(dev, core_specific_flags);
1079         ssb_write32(dev, SSB_TMSLOW,
1080                     SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1081                     SSB_TMSLOW_FGC | core_specific_flags);
1082         ssb_flush_tmslow(dev);
1083
1084         /* Clear SERR if set. This is a hw bug workaround. */
1085         if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1086                 ssb_write32(dev, SSB_TMSHIGH, 0);
1087
1088         val = ssb_read32(dev, SSB_IMSTATE);
1089         if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1090                 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1091                 ssb_write32(dev, SSB_IMSTATE, val);
1092         }
1093
1094         ssb_write32(dev, SSB_TMSLOW,
1095                     SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1096                     core_specific_flags);
1097         ssb_flush_tmslow(dev);
1098
1099         ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1100                     core_specific_flags);
1101         ssb_flush_tmslow(dev);
1102 }
1103 EXPORT_SYMBOL(ssb_device_enable);
1104
1105 /* Wait for a bit in a register to get set or unset.
1106  * timeout is in units of ten-microseconds */
1107 static int ssb_wait_bit(struct ssb_device *dev, u16 reg, u32 bitmask,
1108                         int timeout, int set)
1109 {
1110         int i;
1111         u32 val;
1112
1113         for (i = 0; i < timeout; i++) {
1114                 val = ssb_read32(dev, reg);
1115                 if (set) {
1116                         if (val & bitmask)
1117                                 return 0;
1118                 } else {
1119                         if (!(val & bitmask))
1120                                 return 0;
1121                 }
1122                 udelay(10);
1123         }
1124         printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1125                             "register %04X to %s.\n",
1126                bitmask, reg, (set ? "set" : "clear"));
1127
1128         return -ETIMEDOUT;
1129 }
1130
1131 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1132 {
1133         u32 reject;
1134
1135         if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1136                 return;
1137
1138         reject = ssb_tmslow_reject_bitmask(dev);
1139         ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1140         ssb_wait_bit(dev, SSB_TMSLOW, reject, 1000, 1);
1141         ssb_wait_bit(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
1142         ssb_write32(dev, SSB_TMSLOW,
1143                     SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1144                     reject | SSB_TMSLOW_RESET |
1145                     core_specific_flags);
1146         ssb_flush_tmslow(dev);
1147
1148         ssb_write32(dev, SSB_TMSLOW,
1149                     reject | SSB_TMSLOW_RESET |
1150                     core_specific_flags);
1151         ssb_flush_tmslow(dev);
1152 }
1153 EXPORT_SYMBOL(ssb_device_disable);
1154
1155 u32 ssb_dma_translation(struct ssb_device *dev)
1156 {
1157         switch (dev->bus->bustype) {
1158         case SSB_BUSTYPE_SSB:
1159         case SSB_BUSTYPE_PCMCIA:
1160                 return 0;
1161         case SSB_BUSTYPE_PCI:
1162                 return SSB_PCI_DMA;
1163         }
1164         return 0;
1165 }
1166 EXPORT_SYMBOL(ssb_dma_translation);
1167
1168 int ssb_dma_set_mask(struct ssb_device *ssb_dev, u64 mask)
1169 {
1170         struct device *dma_dev = ssb_dev->dma_dev;
1171
1172 #ifdef CONFIG_SSB_PCIHOST
1173         if (ssb_dev->bus->bustype == SSB_BUSTYPE_PCI)
1174                 return dma_set_mask(dma_dev, mask);
1175 #endif
1176         dma_dev->coherent_dma_mask = mask;
1177         dma_dev->dma_mask = &dma_dev->coherent_dma_mask;
1178
1179         return 0;
1180 }
1181 EXPORT_SYMBOL(ssb_dma_set_mask);
1182
1183 int ssb_bus_may_powerdown(struct ssb_bus *bus)
1184 {
1185         struct ssb_chipcommon *cc;
1186         int err = 0;
1187
1188         /* On buses where more than one core may be working
1189          * at a time, we must not powerdown stuff if there are
1190          * still cores that may want to run. */
1191         if (bus->bustype == SSB_BUSTYPE_SSB)
1192                 goto out;
1193
1194         cc = &bus->chipco;
1195
1196         if (!cc->dev)
1197                 goto out;
1198         if (cc->dev->id.revision < 5)
1199                 goto out;
1200
1201         ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1202         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1203         if (err)
1204                 goto error;
1205 out:
1206 #ifdef CONFIG_SSB_DEBUG
1207         bus->powered_up = 0;
1208 #endif
1209         return err;
1210 error:
1211         ssb_printk(KERN_ERR PFX "Bus powerdown failed\n");
1212         goto out;
1213 }
1214 EXPORT_SYMBOL(ssb_bus_may_powerdown);
1215
1216 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1217 {
1218         struct ssb_chipcommon *cc;
1219         int err;
1220         enum ssb_clkmode mode;
1221
1222         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1223         if (err)
1224                 goto error;
1225         cc = &bus->chipco;
1226         mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1227         ssb_chipco_set_clockmode(cc, mode);
1228
1229 #ifdef CONFIG_SSB_DEBUG
1230         bus->powered_up = 1;
1231 #endif
1232         return 0;
1233 error:
1234         ssb_printk(KERN_ERR PFX "Bus powerup failed\n");
1235         return err;
1236 }
1237 EXPORT_SYMBOL(ssb_bus_powerup);
1238
1239 u32 ssb_admatch_base(u32 adm)
1240 {
1241         u32 base = 0;
1242
1243         switch (adm & SSB_ADM_TYPE) {
1244         case SSB_ADM_TYPE0:
1245                 base = (adm & SSB_ADM_BASE0);
1246                 break;
1247         case SSB_ADM_TYPE1:
1248                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1249                 base = (adm & SSB_ADM_BASE1);
1250                 break;
1251         case SSB_ADM_TYPE2:
1252                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1253                 base = (adm & SSB_ADM_BASE2);
1254                 break;
1255         default:
1256                 SSB_WARN_ON(1);
1257         }
1258
1259         return base;
1260 }
1261 EXPORT_SYMBOL(ssb_admatch_base);
1262
1263 u32 ssb_admatch_size(u32 adm)
1264 {
1265         u32 size = 0;
1266
1267         switch (adm & SSB_ADM_TYPE) {
1268         case SSB_ADM_TYPE0:
1269                 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1270                 break;
1271         case SSB_ADM_TYPE1:
1272                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1273                 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1274                 break;
1275         case SSB_ADM_TYPE2:
1276                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1277                 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1278                 break;
1279         default:
1280                 SSB_WARN_ON(1);
1281         }
1282         size = (1 << (size + 1));
1283
1284         return size;
1285 }
1286 EXPORT_SYMBOL(ssb_admatch_size);
1287
1288 static int __init ssb_modinit(void)
1289 {
1290         int err;
1291
1292         /* See the comment at the ssb_is_early_boot definition */
1293         ssb_is_early_boot = 0;
1294         err = bus_register(&ssb_bustype);
1295         if (err)
1296                 return err;
1297
1298         /* Maybe we already registered some buses at early boot.
1299          * Check for this and attach them
1300          */
1301         ssb_buses_lock();
1302         err = ssb_attach_queued_buses();
1303         ssb_buses_unlock();
1304         if (err)
1305                 bus_unregister(&ssb_bustype);
1306
1307         err = b43_pci_ssb_bridge_init();
1308         if (err) {
1309                 ssb_printk(KERN_ERR "Broadcom 43xx PCI-SSB-bridge "
1310                            "initialization failed\n");
1311                 /* don't fail SSB init because of this */
1312                 err = 0;
1313         }
1314         err = ssb_gige_init();
1315         if (err) {
1316                 ssb_printk(KERN_ERR "SSB Broadcom Gigabit Ethernet "
1317                            "driver initialization failed\n");
1318                 /* don't fail SSB init because of this */
1319                 err = 0;
1320         }
1321
1322         return err;
1323 }
1324 /* ssb must be initialized after PCI but before the ssb drivers.
1325  * That means we must use some initcall between subsys_initcall
1326  * and device_initcall. */
1327 fs_initcall(ssb_modinit);
1328
1329 static void __exit ssb_modexit(void)
1330 {
1331         ssb_gige_exit();
1332         b43_pci_ssb_bridge_exit();
1333         bus_unregister(&ssb_bustype);
1334 }
1335 module_exit(ssb_modexit)