drivers/ssb/main.c

   1 /*
   2  * Sonics Silicon Backplane
   3  * Subsystem core
   4  *
   5  * Copyright 2005, Broadcom Corporation
   6  * Copyright 2006, 2007, Michael Buesch <m@bues.ch>
   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/module.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/ssb/ssb.h>
  18 #include <linux/ssb/ssb_regs.h>
  19 #include <linux/ssb/ssb_driver_gige.h>
  20 #include <linux/dma-mapping.h>
  21 #include <linux/pci.h>
  22 #include <linux/mmc/sdio_func.h>
  23 #include <linux/slab.h>
  24
  25 #include <pcmcia/cistpl.h>
  26 #include <pcmcia/ds.h>
  27
  28
  29 MODULE_DESCRIPTION("Sonics Silicon Backplane driver");
  30 MODULE_LICENSE("GPL");
  31
  32
  33 /* Temporary list of yet-to-be-attached buses */
  34 static LIST_HEAD(attach_queue);
  35 /* List if running buses */
  36 static LIST_HEAD(buses);
  37 /* Software ID counter */
  38 static unsigned int next_busnumber;
  39 /* buses_mutes locks the two buslists and the next_busnumber.
  40  * Don't lock this directly, but use ssb_buses_[un]lock() below.
  41  */
  42 static DEFINE_MUTEX(buses_mutex);
  43
  44 /* There are differences in the codeflow, if the bus is
  45  * initialized from early boot, as various needed services
  46  * are not available early. This is a mechanism to delay
  47  * these initializations to after early boot has finished.
  48  * It's also used to avoid mutex locking, as that's not
  49  * available and needed early.
  50  */
  51 static bool ssb_is_early_boot = 1;
  52
  53 static void ssb_buses_lock(void);
  54 static void ssb_buses_unlock(void);
  55
  56
  57 #ifdef CONFIG_SSB_PCIHOST
  58 struct ssb_bus *ssb_pci_dev_to_bus(struct pci_dev *pdev)
  59 {
  60         struct ssb_bus *bus;
  61
  62         ssb_buses_lock();
  63         list_for_each_entry(bus, &buses, list) {
  64                 if (bus->bustype == SSB_BUSTYPE_PCI &&
  65                     bus->host_pci == pdev)
  66                         goto found;
  67         }
  68         bus = NULL;
  69 found:
  70         ssb_buses_unlock();
  71
  72         return bus;
  73 }
  74 #endif /* CONFIG_SSB_PCIHOST */
  75
  76 #ifdef CONFIG_SSB_PCMCIAHOST
  77 struct ssb_bus *ssb_pcmcia_dev_to_bus(struct pcmcia_device *pdev)
  78 {
  79         struct ssb_bus *bus;
  80
  81         ssb_buses_lock();
  82         list_for_each_entry(bus, &buses, list) {
  83                 if (bus->bustype == SSB_BUSTYPE_PCMCIA &&
  84                     bus->host_pcmcia == pdev)
  85                         goto found;
  86         }
  87         bus = NULL;
  88 found:
  89         ssb_buses_unlock();
  90
  91         return bus;
  92 }
  93 #endif /* CONFIG_SSB_PCMCIAHOST */
  94
  95 int ssb_for_each_bus_call(unsigned long data,
  96                           int (*func)(struct ssb_bus *bus, unsigned long data))
  97 {
  98         struct ssb_bus *bus;
  99         int res;
 100
 101         ssb_buses_lock();
 102         list_for_each_entry(bus, &buses, list) {
 103                 res = func(bus, data);
 104                 if (res >= 0) {
 105                         ssb_buses_unlock();
 106                         return res;
 107                 }
 108         }
 109         ssb_buses_unlock();
 110
 111         return -ENODEV;
 112 }
 113
 114 static struct ssb_device *ssb_device_get(struct ssb_device *dev)
 115 {
 116         if (dev)
 117                 get_device(dev->dev);
 118         return dev;
 119 }
 120
 121 static void ssb_device_put(struct ssb_device *dev)
 122 {
 123         if (dev)
 124                 put_device(dev->dev);
 125 }
 126
 127 static int ssb_device_resume(struct device *dev)
 128 {
 129         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 130         struct ssb_driver *ssb_drv;
 131         int err = 0;
 132
 133         if (dev->driver) {
 134                 ssb_drv = drv_to_ssb_drv(dev->driver);
 135                 if (ssb_drv && ssb_drv->resume)
 136                         err = ssb_drv->resume(ssb_dev);
 137                 if (err)
 138                         goto out;
 139         }
 140 out:
 141         return err;
 142 }
 143
 144 static int ssb_device_suspend(struct device *dev, pm_message_t state)
 145 {
 146         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 147         struct ssb_driver *ssb_drv;
 148         int err = 0;
 149
 150         if (dev->driver) {
 151                 ssb_drv = drv_to_ssb_drv(dev->driver);
 152                 if (ssb_drv && ssb_drv->suspend)
 153                         err = ssb_drv->suspend(ssb_dev, state);
 154                 if (err)
 155                         goto out;
 156         }
 157 out:
 158         return err;
 159 }
 160
 161 int ssb_bus_resume(struct ssb_bus *bus)
 162 {
 163         int err;
 164
 165         /* Reset HW state information in memory, so that HW is
 166          * completely reinitialized.
 167          */
 168         bus->mapped_device = NULL;
 169 #ifdef CONFIG_SSB_DRIVER_PCICORE
 170         bus->pcicore.setup_done = 0;
 171 #endif
 172
 173         err = ssb_bus_powerup(bus, 0);
 174         if (err)
 175                 return err;
 176         err = ssb_pcmcia_hardware_setup(bus);
 177         if (err) {
 178                 ssb_bus_may_powerdown(bus);
 179                 return err;
 180         }
 181         ssb_chipco_resume(&bus->chipco);
 182         ssb_bus_may_powerdown(bus);
 183
 184         return 0;
 185 }
 186 EXPORT_SYMBOL(ssb_bus_resume);
 187
 188 int ssb_bus_suspend(struct ssb_bus *bus)
 189 {
 190         ssb_chipco_suspend(&bus->chipco);
 191         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
 192
 193         return 0;
 194 }
 195 EXPORT_SYMBOL(ssb_bus_suspend);
 196
 197 #ifdef CONFIG_SSB_SPROM
 198 /** ssb_devices_freeze - Freeze all devices on the bus.
 199  *
 200  * After freezing no device driver will be handling a device
 201  * on this bus anymore. ssb_devices_thaw() must be called after
 202  * a successful freeze to reactivate the devices.
 203  *
 204  * @bus: The bus.
 205  * @ctx: Context structure. Pass this to ssb_devices_thaw().
 206  */
 207 int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx)
 208 {
 209         struct ssb_device *sdev;
 210         struct ssb_driver *sdrv;
 211         unsigned int i;
 212
 213         memset(ctx, 0, sizeof(*ctx));
 214         ctx->bus = bus;
 215         WARN_ON(bus->nr_devices > ARRAY_SIZE(ctx->device_frozen));
 216
 217         for (i = 0; i < bus->nr_devices; i++) {
 218                 sdev = ssb_device_get(&bus->devices[i]);
 219
 220                 if (!sdev->dev || !sdev->dev->driver ||
 221                     !device_is_registered(sdev->dev)) {
 222                         ssb_device_put(sdev);
 223                         continue;
 224                 }
 225                 sdrv = drv_to_ssb_drv(sdev->dev->driver);
 226                 if (WARN_ON(!sdrv->remove))
 227                         continue;
 228                 sdrv->remove(sdev);
 229                 ctx->device_frozen[i] = 1;
 230         }
 231
 232         return 0;
 233 }
 234
 235 /** ssb_devices_thaw - Unfreeze all devices on the bus.
 236  *
 237  * This will re-attach the device drivers and re-init the devices.
 238  *
 239  * @ctx: The context structure from ssb_devices_freeze()
 240  */
 241 int ssb_devices_thaw(struct ssb_freeze_context *ctx)
 242 {
 243         struct ssb_bus *bus = ctx->bus;
 244         struct ssb_device *sdev;
 245         struct ssb_driver *sdrv;
 246         unsigned int i;
 247         int err, result = 0;
 248
 249         for (i = 0; i < bus->nr_devices; i++) {
 250                 if (!ctx->device_frozen[i])
 251                         continue;
 252                 sdev = &bus->devices[i];
 253
 254                 if (WARN_ON(!sdev->dev || !sdev->dev->driver))
 255                         continue;
 256                 sdrv = drv_to_ssb_drv(sdev->dev->driver);
 257                 if (WARN_ON(!sdrv || !sdrv->probe))
 258                         continue;
 259
 260                 err = sdrv->probe(sdev, &sdev->id);
 261                 if (err) {
 262                         dev_err(sdev->dev,
 263                                 "Failed to thaw device %s\n",
 264                                 dev_name(sdev->dev));
 265                         result = err;
 266                 }
 267                 ssb_device_put(sdev);
 268         }
 269
 270         return result;
 271 }
 272 #endif /* CONFIG_SSB_SPROM */
 273
 274 static void ssb_device_shutdown(struct device *dev)
 275 {
 276         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 277         struct ssb_driver *ssb_drv;
 278
 279         if (!dev->driver)
 280                 return;
 281         ssb_drv = drv_to_ssb_drv(dev->driver);
 282         if (ssb_drv && ssb_drv->shutdown)
 283                 ssb_drv->shutdown(ssb_dev);
 284 }
 285
 286 static void ssb_device_remove(struct device *dev)
 287 {
 288         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 289         struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
 290
 291         if (ssb_drv && ssb_drv->remove)
 292                 ssb_drv->remove(ssb_dev);
 293         ssb_device_put(ssb_dev);
 294 }
 295
 296 static int ssb_device_probe(struct device *dev)
 297 {
 298         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 299         struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
 300         int err = 0;
 301
 302         ssb_device_get(ssb_dev);
 303         if (ssb_drv && ssb_drv->probe)
 304                 err = ssb_drv->probe(ssb_dev, &ssb_dev->id);
 305         if (err)
 306                 ssb_device_put(ssb_dev);
 307
 308         return err;
 309 }
 310
 311 static int ssb_match_devid(const struct ssb_device_id *tabid,
 312                            const struct ssb_device_id *devid)
 313 {
 314         if ((tabid->vendor != devid->vendor) &&
 315             tabid->vendor != SSB_ANY_VENDOR)
 316                 return 0;
 317         if ((tabid->coreid != devid->coreid) &&
 318             tabid->coreid != SSB_ANY_ID)
 319                 return 0;
 320         if ((tabid->revision != devid->revision) &&
 321             tabid->revision != SSB_ANY_REV)
 322                 return 0;
 323         return 1;
 324 }
 325
 326 static int ssb_bus_match(struct device *dev, struct device_driver *drv)
 327 {
 328         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 329         struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv);
 330         const struct ssb_device_id *id;
 331
 332         for (id = ssb_drv->id_table;
 333              id->vendor || id->coreid || id->revision;
 334              id++) {
 335                 if (ssb_match_devid(id, &ssb_dev->id))
 336                         return 1; /* found */
 337         }
 338
 339         return 0;
 340 }
 341
 342 static int ssb_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
 343 {
 344         const struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 345
 346         if (!dev)
 347                 return -ENODEV;
 348
 349         return add_uevent_var(env,
 350                              "MODALIAS=ssb:v%04Xid%04Xrev%02X",
 351                              ssb_dev->id.vendor, ssb_dev->id.coreid,
 352                              ssb_dev->id.revision);
 353 }
 354
 355 #define ssb_config_attr(attrib, field, format_string) \
 356 static ssize_t \
 357 attrib##_show(struct device *dev, struct device_attribute *attr, char *buf) \
 358 { \
 359         return sprintf(buf, format_string, dev_to_ssb_dev(dev)->field); \
 360 } \
 361 static DEVICE_ATTR_RO(attrib);
 362
 363 ssb_config_attr(core_num, core_index, "%u\n")
 364 ssb_config_attr(coreid, id.coreid, "0x%04x\n")
 365 ssb_config_attr(vendor, id.vendor, "0x%04x\n")
 366 ssb_config_attr(revision, id.revision, "%u\n")
 367 ssb_config_attr(irq, irq, "%u\n")
 368 static ssize_t
 369 name_show(struct device *dev, struct device_attribute *attr, char *buf)
 370 {
 371         return sprintf(buf, "%s\n",
 372                        ssb_core_name(dev_to_ssb_dev(dev)->id.coreid));
 373 }
 374 static DEVICE_ATTR_RO(name);
 375
 376 static struct attribute *ssb_device_attrs[] = {
 377         &dev_attr_name.attr,
 378         &dev_attr_core_num.attr,
 379         &dev_attr_coreid.attr,
 380         &dev_attr_vendor.attr,
 381         &dev_attr_revision.attr,
 382         &dev_attr_irq.attr,
 383         NULL,
 384 };
 385 ATTRIBUTE_GROUPS(ssb_device);
 386
 387 static struct bus_type ssb_bustype = {
 388         .name           = "ssb",
 389         .match          = ssb_bus_match,
 390         .probe          = ssb_device_probe,
 391         .remove         = ssb_device_remove,
 392         .shutdown       = ssb_device_shutdown,
 393         .suspend        = ssb_device_suspend,
 394         .resume         = ssb_device_resume,
 395         .uevent         = ssb_device_uevent,
 396         .dev_groups     = ssb_device_groups,
 397 };
 398
 399 static void ssb_buses_lock(void)
 400 {
 401         /* See the comment at the ssb_is_early_boot definition */
 402         if (!ssb_is_early_boot)
 403                 mutex_lock(&buses_mutex);
 404 }
 405
 406 static void ssb_buses_unlock(void)
 407 {
 408         /* See the comment at the ssb_is_early_boot definition */
 409         if (!ssb_is_early_boot)
 410                 mutex_unlock(&buses_mutex);
 411 }
 412
 413 static void ssb_devices_unregister(struct ssb_bus *bus)
 414 {
 415         struct ssb_device *sdev;
 416         int i;
 417
 418         for (i = bus->nr_devices - 1; i >= 0; i--) {
 419                 sdev = &(bus->devices[i]);
 420                 if (sdev->dev)
 421                         device_unregister(sdev->dev);
 422         }
 423
 424 #ifdef CONFIG_SSB_EMBEDDED
 425         if (bus->bustype == SSB_BUSTYPE_SSB)
 426                 platform_device_unregister(bus->watchdog);
 427 #endif
 428 }
 429
 430 void ssb_bus_unregister(struct ssb_bus *bus)
 431 {
 432         int err;
 433
 434         err = ssb_gpio_unregister(bus);
 435         if (err)
 436                 pr_debug("Can not unregister GPIO driver: %i\n", err);
 437
 438         ssb_buses_lock();
 439         ssb_devices_unregister(bus);
 440         list_del(&bus->list);
 441         ssb_buses_unlock();
 442
 443         ssb_pcmcia_exit(bus);
 444         ssb_pci_exit(bus);
 445         ssb_iounmap(bus);
 446 }
 447 EXPORT_SYMBOL(ssb_bus_unregister);
 448
 449 static void ssb_release_dev(struct device *dev)
 450 {
 451         struct __ssb_dev_wrapper *devwrap;
 452
 453         devwrap = container_of(dev, struct __ssb_dev_wrapper, dev);
 454         kfree(devwrap);
 455 }
 456
 457 static int ssb_devices_register(struct ssb_bus *bus)
 458 {
 459         struct ssb_device *sdev;
 460         struct device *dev;
 461         struct __ssb_dev_wrapper *devwrap;
 462         int i, err = 0;
 463         int dev_idx = 0;
 464
 465         for (i = 0; i < bus->nr_devices; i++) {
 466                 sdev = &(bus->devices[i]);
 467
 468                 /* We don't register SSB-system devices to the kernel,
 469                  * as the drivers for them are built into SSB.
 470                  */
 471                 switch (sdev->id.coreid) {
 472                 case SSB_DEV_CHIPCOMMON:
 473                 case SSB_DEV_PCI:
 474                 case SSB_DEV_PCIE:
 475                 case SSB_DEV_PCMCIA:
 476                 case SSB_DEV_MIPS:
 477                 case SSB_DEV_MIPS_3302:
 478                 case SSB_DEV_EXTIF:
 479                         continue;
 480                 }
 481
 482                 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL);
 483                 if (!devwrap) {
 484                         err = -ENOMEM;
 485                         goto error;
 486                 }
 487                 dev = &devwrap->dev;
 488                 devwrap->sdev = sdev;
 489
 490                 dev->release = ssb_release_dev;
 491                 dev->bus = &ssb_bustype;
 492                 dev_set_name(dev, "ssb%u:%d", bus->busnumber, dev_idx);
 493
 494                 switch (bus->bustype) {
 495                 case SSB_BUSTYPE_PCI:
 496 #ifdef CONFIG_SSB_PCIHOST
 497                         sdev->irq = bus->host_pci->irq;
 498                         dev->parent = &bus->host_pci->dev;
 499                         sdev->dma_dev = dev->parent;
 500 #endif
 501                         break;
 502                 case SSB_BUSTYPE_PCMCIA:
 503 #ifdef CONFIG_SSB_PCMCIAHOST
 504                         sdev->irq = bus->host_pcmcia->irq;
 505                         dev->parent = &bus->host_pcmcia->dev;
 506 #endif
 507                         break;
 508                 case SSB_BUSTYPE_SDIO:
 509 #ifdef CONFIG_SSB_SDIOHOST
 510                         dev->parent = &bus->host_sdio->dev;
 511 #endif
 512                         break;
 513                 case SSB_BUSTYPE_SSB:
 514                         dev->dma_mask = &dev->coherent_dma_mask;
 515                         sdev->dma_dev = dev;
 516                         break;
 517                 }
 518
 519                 sdev->dev = dev;
 520                 err = device_register(dev);
 521                 if (err) {
 522                         pr_err("Could not register %s\n", dev_name(dev));
 523                         /* Set dev to NULL to not unregister
 524                          * dev on error unwinding.
 525                          */
 526                         sdev->dev = NULL;
 527                         put_device(dev);
 528                         goto error;
 529                 }
 530                 dev_idx++;
 531         }
 532
 533 #ifdef CONFIG_SSB_DRIVER_MIPS
 534         if (bus->mipscore.pflash.present) {
 535                 err = platform_device_register(&ssb_pflash_dev);
 536                 if (err)
 537                         pr_err("Error registering parallel flash\n");
 538         }
 539 #endif
 540
 541 #ifdef CONFIG_SSB_SFLASH
 542         if (bus->mipscore.sflash.present) {
 543                 err = platform_device_register(&ssb_sflash_dev);
 544                 if (err)
 545                         pr_err("Error registering serial flash\n");
 546         }
 547 #endif
 548
 549         return 0;
 550 error:
 551         /* Unwind the already registered devices. */
 552         ssb_devices_unregister(bus);
 553         return err;
 554 }
 555
 556 /* Needs ssb_buses_lock() */
 557 static int ssb_attach_queued_buses(void)
 558 {
 559         struct ssb_bus *bus, *n;
 560         int err = 0;
 561         int drop_them_all = 0;
 562
 563         list_for_each_entry_safe(bus, n, &attach_queue, list) {
 564                 if (drop_them_all) {
 565                         list_del(&bus->list);
 566                         continue;
 567                 }
 568                 /* Can't init the PCIcore in ssb_bus_register(), as that
 569                  * is too early in boot for embedded systems
 570                  * (no udelay() available). So do it here in attach stage.
 571                  */
 572                 err = ssb_bus_powerup(bus, 0);
 573                 if (err)
 574                         goto error;
 575                 ssb_pcicore_init(&bus->pcicore);
 576                 if (bus->bustype == SSB_BUSTYPE_SSB)
 577                         ssb_watchdog_register(bus);
 578
 579                 err = ssb_gpio_init(bus);
 580                 if (err == -ENOTSUPP)
 581                         pr_debug("GPIO driver not activated\n");
 582                 else if (err)
 583                         pr_debug("Error registering GPIO driver: %i\n", err);
 584
 585                 ssb_bus_may_powerdown(bus);
 586
 587                 err = ssb_devices_register(bus);
 588 error:
 589                 if (err) {
 590                         drop_them_all = 1;
 591                         list_del(&bus->list);
 592                         continue;
 593                 }
 594                 list_move_tail(&bus->list, &buses);
 595         }
 596
 597         return err;
 598 }
 599
 600 static int ssb_fetch_invariants(struct ssb_bus *bus,
 601                                 ssb_invariants_func_t get_invariants)
 602 {
 603         struct ssb_init_invariants iv;
 604         int err;
 605
 606         memset(&iv, 0, sizeof(iv));
 607         err = get_invariants(bus, &iv);
 608         if (err)
 609                 goto out;
 610         memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
 611         memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
 612         bus->has_cardbus_slot = iv.has_cardbus_slot;
 613 out:
 614         return err;
 615 }
 616
 617 static int __maybe_unused
 618 ssb_bus_register(struct ssb_bus *bus,
 619                  ssb_invariants_func_t get_invariants,
 620                  unsigned long baseaddr)
 621 {
 622         int err;
 623
 624         spin_lock_init(&bus->bar_lock);
 625         INIT_LIST_HEAD(&bus->list);
 626 #ifdef CONFIG_SSB_EMBEDDED
 627         spin_lock_init(&bus->gpio_lock);
 628 #endif
 629
 630         /* Powerup the bus */
 631         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
 632         if (err)
 633                 goto out;
 634
 635         /* Init SDIO-host device (if any), before the scan */
 636         err = ssb_sdio_init(bus);
 637         if (err)
 638                 goto err_disable_xtal;
 639
 640         ssb_buses_lock();
 641         bus->busnumber = next_busnumber;
 642         /* Scan for devices (cores) */
 643         err = ssb_bus_scan(bus, baseaddr);
 644         if (err)
 645                 goto err_sdio_exit;
 646
 647         /* Init PCI-host device (if any) */
 648         err = ssb_pci_init(bus);
 649         if (err)
 650                 goto err_unmap;
 651         /* Init PCMCIA-host device (if any) */
 652         err = ssb_pcmcia_init(bus);
 653         if (err)
 654                 goto err_pci_exit;
 655
 656         /* Initialize basic system devices (if available) */
 657         err = ssb_bus_powerup(bus, 0);
 658         if (err)
 659                 goto err_pcmcia_exit;
 660         ssb_chipcommon_init(&bus->chipco);
 661         ssb_extif_init(&bus->extif);
 662         ssb_mipscore_init(&bus->mipscore);
 663         err = ssb_fetch_invariants(bus, get_invariants);
 664         if (err) {
 665                 ssb_bus_may_powerdown(bus);
 666                 goto err_pcmcia_exit;
 667         }
 668         ssb_bus_may_powerdown(bus);
 669
 670         /* Queue it for attach.
 671          * See the comment at the ssb_is_early_boot definition.
 672          */
 673         list_add_tail(&bus->list, &attach_queue);
 674         if (!ssb_is_early_boot) {
 675                 /* This is not early boot, so we must attach the bus now */
 676                 err = ssb_attach_queued_buses();
 677                 if (err)
 678                         goto err_dequeue;
 679         }
 680         next_busnumber++;
 681         ssb_buses_unlock();
 682
 683 out:
 684         return err;
 685
 686 err_dequeue:
 687         list_del(&bus->list);
 688 err_pcmcia_exit:
 689         ssb_pcmcia_exit(bus);
 690 err_pci_exit:
 691         ssb_pci_exit(bus);
 692 err_unmap:
 693         ssb_iounmap(bus);
 694 err_sdio_exit:
 695         ssb_sdio_exit(bus);
 696 err_disable_xtal:
 697         ssb_buses_unlock();
 698         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
 699         return err;
 700 }
 701
 702 #ifdef CONFIG_SSB_PCIHOST
 703 int ssb_bus_pcibus_register(struct ssb_bus *bus, struct pci_dev *host_pci)
 704 {
 705         int err;
 706
 707         bus->bustype = SSB_BUSTYPE_PCI;
 708         bus->host_pci = host_pci;
 709         bus->ops = &ssb_pci_ops;
 710
 711         err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
 712         if (!err) {
 713                 dev_info(&host_pci->dev,
 714                          "Sonics Silicon Backplane found on PCI device %s\n",
 715                          dev_name(&host_pci->dev));
 716         } else {
 717                 dev_err(&host_pci->dev,
 718                         "Failed to register PCI version of SSB with error %d\n",
 719                         err);
 720         }
 721
 722         return err;
 723 }
 724 #endif /* CONFIG_SSB_PCIHOST */
 725
 726 #ifdef CONFIG_SSB_PCMCIAHOST
 727 int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
 728                                struct pcmcia_device *pcmcia_dev,
 729                                unsigned long baseaddr)
 730 {
 731         int err;
 732
 733         bus->bustype = SSB_BUSTYPE_PCMCIA;
 734         bus->host_pcmcia = pcmcia_dev;
 735         bus->ops = &ssb_pcmcia_ops;
 736
 737         err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
 738         if (!err) {
 739                 dev_info(&pcmcia_dev->dev,
 740                          "Sonics Silicon Backplane found on PCMCIA device %s\n",
 741                          pcmcia_dev->devname);
 742         }
 743
 744         return err;
 745 }
 746 #endif /* CONFIG_SSB_PCMCIAHOST */
 747
 748 #ifdef CONFIG_SSB_SDIOHOST
 749 int ssb_bus_sdiobus_register(struct ssb_bus *bus, struct sdio_func *func,
 750                              unsigned int quirks)
 751 {
 752         int err;
 753
 754         bus->bustype = SSB_BUSTYPE_SDIO;
 755         bus->host_sdio = func;
 756         bus->ops = &ssb_sdio_ops;
 757         bus->quirks = quirks;
 758
 759         err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0);
 760         if (!err) {
 761                 dev_info(&func->dev,
 762                          "Sonics Silicon Backplane found on SDIO device %s\n",
 763                          sdio_func_id(func));
 764         }
 765
 766         return err;
 767 }
 768 EXPORT_SYMBOL(ssb_bus_sdiobus_register);
 769 #endif /* CONFIG_SSB_PCMCIAHOST */
 770
 771 #ifdef CONFIG_SSB_HOST_SOC
 772 int ssb_bus_host_soc_register(struct ssb_bus *bus, unsigned long baseaddr)
 773 {
 774         int err;
 775
 776         bus->bustype = SSB_BUSTYPE_SSB;
 777         bus->ops = &ssb_host_soc_ops;
 778
 779         err = ssb_bus_register(bus, ssb_host_soc_get_invariants, baseaddr);
 780         if (!err) {
 781                 pr_info("Sonics Silicon Backplane found at address 0x%08lX\n",
 782                         baseaddr);
 783         }
 784
 785         return err;
 786 }
 787 #endif
 788
 789 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
 790 {
 791         drv->drv.name = drv->name;
 792         drv->drv.bus = &ssb_bustype;
 793         drv->drv.owner = owner;
 794
 795         return driver_register(&drv->drv);
 796 }
 797 EXPORT_SYMBOL(__ssb_driver_register);
 798
 799 void ssb_driver_unregister(struct ssb_driver *drv)
 800 {
 801         driver_unregister(&drv->drv);
 802 }
 803 EXPORT_SYMBOL(ssb_driver_unregister);
 804
 805 void ssb_set_devtypedata(struct ssb_device *dev, void *data)
 806 {
 807         struct ssb_bus *bus = dev->bus;
 808         struct ssb_device *ent;
 809         int i;
 810
 811         for (i = 0; i < bus->nr_devices; i++) {
 812                 ent = &(bus->devices[i]);
 813                 if (ent->id.vendor != dev->id.vendor)
 814                         continue;
 815                 if (ent->id.coreid != dev->id.coreid)
 816                         continue;
 817
 818                 ent->devtypedata = data;
 819         }
 820 }
 821 EXPORT_SYMBOL(ssb_set_devtypedata);
 822
 823 static u32 clkfactor_f6_resolve(u32 v)
 824 {
 825         /* map the magic values */
 826         switch (v) {
 827         case SSB_CHIPCO_CLK_F6_2:
 828                 return 2;
 829         case SSB_CHIPCO_CLK_F6_3:
 830                 return 3;
 831         case SSB_CHIPCO_CLK_F6_4:
 832                 return 4;
 833         case SSB_CHIPCO_CLK_F6_5:
 834                 return 5;
 835         case SSB_CHIPCO_CLK_F6_6:
 836                 return 6;
 837         case SSB_CHIPCO_CLK_F6_7:
 838                 return 7;
 839         }
 840         return 0;
 841 }
 842
 843 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
 844 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
 845 {
 846         u32 n1, n2, clock, m1, m2, m3, mc;
 847
 848         n1 = (n & SSB_CHIPCO_CLK_N1);
 849         n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
 850
 851         switch (plltype) {
 852         case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
 853                 if (m & SSB_CHIPCO_CLK_T6_MMASK)
 854                         return SSB_CHIPCO_CLK_T6_M1;
 855                 return SSB_CHIPCO_CLK_T6_M0;
 856         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
 857         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
 858         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
 859         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
 860                 n1 = clkfactor_f6_resolve(n1);
 861                 n2 += SSB_CHIPCO_CLK_F5_BIAS;
 862                 break;
 863         case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
 864                 n1 += SSB_CHIPCO_CLK_T2_BIAS;
 865                 n2 += SSB_CHIPCO_CLK_T2_BIAS;
 866                 WARN_ON(!((n1 >= 2) && (n1 <= 7)));
 867                 WARN_ON(!((n2 >= 5) && (n2 <= 23)));
 868                 break;
 869         case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
 870                 return 100000000;
 871         default:
 872                 WARN_ON(1);
 873         }
 874
 875         switch (plltype) {
 876         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
 877         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
 878                 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
 879                 break;
 880         default:
 881                 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
 882         }
 883         if (!clock)
 884                 return 0;
 885
 886         m1 = (m & SSB_CHIPCO_CLK_M1);
 887         m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
 888         m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
 889         mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
 890
 891         switch (plltype) {
 892         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
 893         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
 894         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
 895         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
 896                 m1 = clkfactor_f6_resolve(m1);
 897                 if ((plltype == SSB_PLLTYPE_1) ||
 898                     (plltype == SSB_PLLTYPE_3))
 899                         m2 += SSB_CHIPCO_CLK_F5_BIAS;
 900                 else
 901                         m2 = clkfactor_f6_resolve(m2);
 902                 m3 = clkfactor_f6_resolve(m3);
 903
 904                 switch (mc) {
 905                 case SSB_CHIPCO_CLK_MC_BYPASS:
 906                         return clock;
 907                 case SSB_CHIPCO_CLK_MC_M1:
 908                         return (clock / m1);
 909                 case SSB_CHIPCO_CLK_MC_M1M2:
 910                         return (clock / (m1 * m2));
 911                 case SSB_CHIPCO_CLK_MC_M1M2M3:
 912                         return (clock / (m1 * m2 * m3));
 913                 case SSB_CHIPCO_CLK_MC_M1M3:
 914                         return (clock / (m1 * m3));
 915                 }
 916                 return 0;
 917         case SSB_PLLTYPE_2:
 918                 m1 += SSB_CHIPCO_CLK_T2_BIAS;
 919                 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
 920                 m3 += SSB_CHIPCO_CLK_T2_BIAS;
 921                 WARN_ON(!((m1 >= 2) && (m1 <= 7)));
 922                 WARN_ON(!((m2 >= 3) && (m2 <= 10)));
 923                 WARN_ON(!((m3 >= 2) && (m3 <= 7)));
 924
 925                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
 926                         clock /= m1;
 927                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
 928                         clock /= m2;
 929                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
 930                         clock /= m3;
 931                 return clock;
 932         default:
 933                 WARN_ON(1);
 934         }
 935         return 0;
 936 }
 937
 938 /* Get the current speed the backplane is running at */
 939 u32 ssb_clockspeed(struct ssb_bus *bus)
 940 {
 941         u32 rate;
 942         u32 plltype;
 943         u32 clkctl_n, clkctl_m;
 944
 945         if (bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU)
 946                 return ssb_pmu_get_controlclock(&bus->chipco);
 947
 948         if (ssb_extif_available(&bus->extif))
 949                 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
 950                                            &clkctl_n, &clkctl_m);
 951         else if (bus->chipco.dev)
 952                 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
 953                                             &clkctl_n, &clkctl_m);
 954         else
 955                 return 0;
 956
 957         if (bus->chip_id == 0x5365) {
 958                 rate = 100000000;
 959         } else {
 960                 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
 961                 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
 962                         rate /= 2;
 963         }
 964
 965         return rate;
 966 }
 967 EXPORT_SYMBOL(ssb_clockspeed);
 968
 969 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
 970 {
 971         u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
 972
 973         /* The REJECT bit seems to be different for Backplane rev 2.3 */
 974         switch (rev) {
 975         case SSB_IDLOW_SSBREV_22:
 976         case SSB_IDLOW_SSBREV_24:
 977         case SSB_IDLOW_SSBREV_26:
 978                 return SSB_TMSLOW_REJECT;
 979         case SSB_IDLOW_SSBREV_23:
 980                 return SSB_TMSLOW_REJECT_23;
 981         case SSB_IDLOW_SSBREV_25:     /* TODO - find the proper REJECT bit */
 982         case SSB_IDLOW_SSBREV_27:     /* same here */
 983                 return SSB_TMSLOW_REJECT;       /* this is a guess */
 984         case SSB_IDLOW_SSBREV:
 985                 break;
 986         default:
 987                 WARN(1, KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
 988         }
 989         return (SSB_TMSLOW_REJECT | SSB_TMSLOW_REJECT_23);
 990 }
 991
 992 int ssb_device_is_enabled(struct ssb_device *dev)
 993 {
 994         u32 val;
 995         u32 reject;
 996
 997         reject = ssb_tmslow_reject_bitmask(dev);
 998         val = ssb_read32(dev, SSB_TMSLOW);
 999         val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1000
1001         return (val == SSB_TMSLOW_CLOCK);
1002 }
1003 EXPORT_SYMBOL(ssb_device_is_enabled);
1004
1005 static void ssb_flush_tmslow(struct ssb_device *dev)
1006 {
1007         /* Make _really_ sure the device has finished the TMSLOW
1008          * register write transaction, as we risk running into
1009          * a machine check exception otherwise.
1010          * Do this by reading the register back to commit the
1011          * PCI write and delay an additional usec for the device
1012          * to react to the change.
1013          */
1014         ssb_read32(dev, SSB_TMSLOW);
1015         udelay(1);
1016 }
1017
1018 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1019 {
1020         u32 val;
1021
1022         ssb_device_disable(dev, core_specific_flags);
1023         ssb_write32(dev, SSB_TMSLOW,
1024                     SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1025                     SSB_TMSLOW_FGC | core_specific_flags);
1026         ssb_flush_tmslow(dev);
1027
1028         /* Clear SERR if set. This is a hw bug workaround. */
1029         if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1030                 ssb_write32(dev, SSB_TMSHIGH, 0);
1031
1032         val = ssb_read32(dev, SSB_IMSTATE);
1033         if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1034                 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1035                 ssb_write32(dev, SSB_IMSTATE, val);
1036         }
1037
1038         ssb_write32(dev, SSB_TMSLOW,
1039                     SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1040                     core_specific_flags);
1041         ssb_flush_tmslow(dev);
1042
1043         ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1044                     core_specific_flags);
1045         ssb_flush_tmslow(dev);
1046 }
1047 EXPORT_SYMBOL(ssb_device_enable);
1048
1049 /* Wait for bitmask in a register to get set or cleared.
1050  * timeout is in units of ten-microseconds
1051  */
1052 static int ssb_wait_bits(struct ssb_device *dev, u16 reg, u32 bitmask,
1053                          int timeout, int set)
1054 {
1055         int i;
1056         u32 val;
1057
1058         for (i = 0; i < timeout; i++) {
1059                 val = ssb_read32(dev, reg);
1060                 if (set) {
1061                         if ((val & bitmask) == bitmask)
1062                                 return 0;
1063                 } else {
1064                         if (!(val & bitmask))
1065                                 return 0;
1066                 }
1067                 udelay(10);
1068         }
1069         dev_err(dev->dev,
1070                 "Timeout waiting for bitmask %08X on register %04X to %s\n",
1071                 bitmask, reg, set ? "set" : "clear");
1072
1073         return -ETIMEDOUT;
1074 }
1075
1076 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1077 {
1078         u32 reject, val;
1079
1080         if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1081                 return;
1082
1083         reject = ssb_tmslow_reject_bitmask(dev);
1084
1085         if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_CLOCK) {
1086                 ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1087                 ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1);
1088                 ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
1089
1090                 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1091                         val = ssb_read32(dev, SSB_IMSTATE);
1092                         val |= SSB_IMSTATE_REJECT;
1093                         ssb_write32(dev, SSB_IMSTATE, val);
1094                         ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000,
1095                                       0);
1096                 }
1097
1098                 ssb_write32(dev, SSB_TMSLOW,
1099                         SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1100                         reject | SSB_TMSLOW_RESET |
1101                         core_specific_flags);
1102                 ssb_flush_tmslow(dev);
1103
1104                 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1105                         val = ssb_read32(dev, SSB_IMSTATE);
1106                         val &= ~SSB_IMSTATE_REJECT;
1107                         ssb_write32(dev, SSB_IMSTATE, val);
1108                 }
1109         }
1110
1111         ssb_write32(dev, SSB_TMSLOW,
1112                     reject | SSB_TMSLOW_RESET |
1113                     core_specific_flags);
1114         ssb_flush_tmslow(dev);
1115 }
1116 EXPORT_SYMBOL(ssb_device_disable);
1117
1118 /* Some chipsets need routing known for PCIe and 64-bit DMA */
1119 static bool ssb_dma_translation_special_bit(struct ssb_device *dev)
1120 {
1121         u16 chip_id = dev->bus->chip_id;
1122
1123         if (dev->id.coreid == SSB_DEV_80211) {
1124                 return (chip_id == 0x4322 || chip_id == 43221 ||
1125                         chip_id == 43231 || chip_id == 43222);
1126         }
1127
1128         return false;
1129 }
1130
1131 u32 ssb_dma_translation(struct ssb_device *dev)
1132 {
1133         switch (dev->bus->bustype) {
1134         case SSB_BUSTYPE_SSB:
1135                 return 0;
1136         case SSB_BUSTYPE_PCI:
1137                 if (pci_is_pcie(dev->bus->host_pci) &&
1138                     ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_DMA64) {
1139                         return SSB_PCIE_DMA_H32;
1140                 } else {
1141                         if (ssb_dma_translation_special_bit(dev))
1142                                 return SSB_PCIE_DMA_H32;
1143                         else
1144                                 return SSB_PCI_DMA;
1145                 }
1146         default:
1147                 __ssb_dma_not_implemented(dev);
1148         }
1149         return 0;
1150 }
1151 EXPORT_SYMBOL(ssb_dma_translation);
1152
1153 int ssb_bus_may_powerdown(struct ssb_bus *bus)
1154 {
1155         struct ssb_chipcommon *cc;
1156         int err = 0;
1157
1158         /* On buses where more than one core may be working
1159          * at a time, we must not powerdown stuff if there are
1160          * still cores that may want to run.
1161          */
1162         if (bus->bustype == SSB_BUSTYPE_SSB)
1163                 goto out;
1164
1165         cc = &bus->chipco;
1166
1167         if (!cc->dev)
1168                 goto out;
1169         if (cc->dev->id.revision < 5)
1170                 goto out;
1171
1172         ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1173         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1174         if (err)
1175                 goto error;
1176 out:
1177         bus->powered_up = 0;
1178         return err;
1179 error:
1180         pr_err("Bus powerdown failed\n");
1181         goto out;
1182 }
1183 EXPORT_SYMBOL(ssb_bus_may_powerdown);
1184
1185 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1186 {
1187         int err;
1188         enum ssb_clkmode mode;
1189
1190         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1191         if (err)
1192                 goto error;
1193
1194         bus->powered_up = 1;
1195
1196         mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1197         ssb_chipco_set_clockmode(&bus->chipco, mode);
1198
1199         return 0;
1200 error:
1201         pr_err("Bus powerup failed\n");
1202         return err;
1203 }
1204 EXPORT_SYMBOL(ssb_bus_powerup);
1205
1206 static void ssb_broadcast_value(struct ssb_device *dev,
1207                                 u32 address, u32 data)
1208 {
1209 #ifdef CONFIG_SSB_DRIVER_PCICORE
1210         /* This is used for both, PCI and ChipCommon core, so be careful. */
1211         BUILD_BUG_ON(SSB_PCICORE_BCAST_ADDR != SSB_CHIPCO_BCAST_ADDR);
1212         BUILD_BUG_ON(SSB_PCICORE_BCAST_DATA != SSB_CHIPCO_BCAST_DATA);
1213 #endif
1214
1215         ssb_write32(dev, SSB_CHIPCO_BCAST_ADDR, address);
1216         ssb_read32(dev, SSB_CHIPCO_BCAST_ADDR); /* flush */
1217         ssb_write32(dev, SSB_CHIPCO_BCAST_DATA, data);
1218         ssb_read32(dev, SSB_CHIPCO_BCAST_DATA); /* flush */
1219 }
1220
1221 void ssb_commit_settings(struct ssb_bus *bus)
1222 {
1223         struct ssb_device *dev;
1224
1225 #ifdef CONFIG_SSB_DRIVER_PCICORE
1226         dev = bus->chipco.dev ? bus->chipco.dev : bus->pcicore.dev;
1227 #else
1228         dev = bus->chipco.dev;
1229 #endif
1230         if (WARN_ON(!dev))
1231                 return;
1232         /* This forces an update of the cached registers. */
1233         ssb_broadcast_value(dev, 0xFD8, 0);
1234 }
1235 EXPORT_SYMBOL(ssb_commit_settings);
1236
1237 u32 ssb_admatch_base(u32 adm)
1238 {
1239         u32 base = 0;
1240
1241         switch (adm & SSB_ADM_TYPE) {
1242         case SSB_ADM_TYPE0:
1243                 base = (adm & SSB_ADM_BASE0);
1244                 break;
1245         case SSB_ADM_TYPE1:
1246                 WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1247                 base = (adm & SSB_ADM_BASE1);
1248                 break;
1249         case SSB_ADM_TYPE2:
1250                 WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1251                 base = (adm & SSB_ADM_BASE2);
1252                 break;
1253         default:
1254                 WARN_ON(1);
1255         }
1256
1257         return base;
1258 }
1259 EXPORT_SYMBOL(ssb_admatch_base);
1260
1261 u32 ssb_admatch_size(u32 adm)
1262 {
1263         u32 size = 0;
1264
1265         switch (adm & SSB_ADM_TYPE) {
1266         case SSB_ADM_TYPE0:
1267                 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1268                 break;
1269         case SSB_ADM_TYPE1:
1270                 WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1271                 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1272                 break;
1273         case SSB_ADM_TYPE2:
1274                 WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1275                 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1276                 break;
1277         default:
1278                 WARN_ON(1);
1279         }
1280         size = (1 << (size + 1));
1281
1282         return size;
1283 }
1284 EXPORT_SYMBOL(ssb_admatch_size);
1285
1286 static int __init ssb_modinit(void)
1287 {
1288         int err;
1289
1290         /* See the comment at the ssb_is_early_boot definition */
1291         ssb_is_early_boot = 0;
1292         err = bus_register(&ssb_bustype);
1293         if (err)
1294                 return err;
1295
1296         /* Maybe we already registered some buses at early boot.
1297          * Check for this and attach them
1298          */
1299         ssb_buses_lock();
1300         err = ssb_attach_queued_buses();
1301         ssb_buses_unlock();
1302         if (err) {
1303                 bus_unregister(&ssb_bustype);
1304                 goto out;
1305         }
1306
1307         err = b43_pci_ssb_bridge_init();
1308         if (err) {
1309                 pr_err("Broadcom 43xx PCI-SSB-bridge initialization failed\n");
1310                 /* don't fail SSB init because of this */
1311         }
1312         err = ssb_host_pcmcia_init();
1313         if (err) {
1314                 pr_err("PCMCIA host initialization failed\n");
1315                 /* don't fail SSB init because of this */
1316         }
1317         err = ssb_gige_init();
1318         if (err) {
1319                 pr_err("SSB Broadcom Gigabit Ethernet driver initialization failed\n");
1320                 /* don't fail SSB init because of this */
1321                 err = 0;
1322         }
1323 out:
1324         return err;
1325 }
1326 /* ssb must be initialized after PCI but before the ssb drivers.
1327  * That means we must use some initcall between subsys_initcall
1328  * and device_initcall.
1329  */
1330 fs_initcall(ssb_modinit);
1331
1332 static void __exit ssb_modexit(void)
1333 {
1334         ssb_gige_exit();
1335         ssb_host_pcmcia_exit();
1336         b43_pci_ssb_bridge_exit();
1337         bus_unregister(&ssb_bustype);
1338 }
1339 module_exit(ssb_modexit)