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/ssb/ssb.h>
  17 #include <linux/ssb/ssb_regs.h>
  18 #include <linux/ssb/ssb_driver_gige.h>
  19 #include <linux/dma-mapping.h>
  20 #include <linux/pci.h>
  21 #include <linux/mmc/sdio_func.h>
  22 #include <linux/slab.h>
  23
  24 #include <pcmcia/cistpl.h>
  25 #include <pcmcia/ds.h>
  26
  27
  28 MODULE_DESCRIPTION("Sonics Silicon Backplane driver");
  29 MODULE_LICENSE("GPL");
  30
  31
  32 /* Temporary list of yet-to-be-attached buses */
  33 static LIST_HEAD(attach_queue);
  34 /* List if running buses */
  35 static LIST_HEAD(buses);
  36 /* Software ID counter */
  37 static unsigned int next_busnumber;
  38 /* buses_mutes locks the two buslists and the next_busnumber.
  39  * Don't lock this directly, but use ssb_buses_[un]lock() below. */
  40 static DEFINE_MUTEX(buses_mutex);
  41
  42 /* There are differences in the codeflow, if the bus is
  43  * initialized from early boot, as various needed services
  44  * are not available early. This is a mechanism to delay
  45  * these initializations to after early boot has finished.
  46  * It's also used to avoid mutex locking, as that's not
  47  * available and needed early. */
  48 static bool ssb_is_early_boot = 1;
  49
  50 static void ssb_buses_lock(void);
  51 static void ssb_buses_unlock(void);
  52
  53
  54 #ifdef CONFIG_SSB_PCIHOST
  55 struct ssb_bus *ssb_pci_dev_to_bus(struct pci_dev *pdev)
  56 {
  57         struct ssb_bus *bus;
  58
  59         ssb_buses_lock();
  60         list_for_each_entry(bus, &buses, list) {
  61                 if (bus->bustype == SSB_BUSTYPE_PCI &&
  62                     bus->host_pci == pdev)
  63                         goto found;
  64         }
  65         bus = NULL;
  66 found:
  67         ssb_buses_unlock();
  68
  69         return bus;
  70 }
  71 #endif /* CONFIG_SSB_PCIHOST */
  72
  73 #ifdef CONFIG_SSB_PCMCIAHOST
  74 struct ssb_bus *ssb_pcmcia_dev_to_bus(struct pcmcia_device *pdev)
  75 {
  76         struct ssb_bus *bus;
  77
  78         ssb_buses_lock();
  79         list_for_each_entry(bus, &buses, list) {
  80                 if (bus->bustype == SSB_BUSTYPE_PCMCIA &&
  81                     bus->host_pcmcia == pdev)
  82                         goto found;
  83         }
  84         bus = NULL;
  85 found:
  86         ssb_buses_unlock();
  87
  88         return bus;
  89 }
  90 #endif /* CONFIG_SSB_PCMCIAHOST */
  91
  92 #ifdef CONFIG_SSB_SDIOHOST
  93 struct ssb_bus *ssb_sdio_func_to_bus(struct sdio_func *func)
  94 {
  95         struct ssb_bus *bus;
  96
  97         ssb_buses_lock();
  98         list_for_each_entry(bus, &buses, list) {
  99                 if (bus->bustype == SSB_BUSTYPE_SDIO &&
 100                     bus->host_sdio == func)
 101                         goto found;
 102         }
 103         bus = NULL;
 104 found:
 105         ssb_buses_unlock();
 106
 107         return bus;
 108 }
 109 #endif /* CONFIG_SSB_SDIOHOST */
 110
 111 int ssb_for_each_bus_call(unsigned long data,
 112                           int (*func)(struct ssb_bus *bus, unsigned long data))
 113 {
 114         struct ssb_bus *bus;
 115         int res;
 116
 117         ssb_buses_lock();
 118         list_for_each_entry(bus, &buses, list) {
 119                 res = func(bus, data);
 120                 if (res >= 0) {
 121                         ssb_buses_unlock();
 122                         return res;
 123                 }
 124         }
 125         ssb_buses_unlock();
 126
 127         return -ENODEV;
 128 }
 129
 130 static struct ssb_device *ssb_device_get(struct ssb_device *dev)
 131 {
 132         if (dev)
 133                 get_device(dev->dev);
 134         return dev;
 135 }
 136
 137 static void ssb_device_put(struct ssb_device *dev)
 138 {
 139         if (dev)
 140                 put_device(dev->dev);
 141 }
 142
 143 static int ssb_device_resume(struct device *dev)
 144 {
 145         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 146         struct ssb_driver *ssb_drv;
 147         int err = 0;
 148
 149         if (dev->driver) {
 150                 ssb_drv = drv_to_ssb_drv(dev->driver);
 151                 if (ssb_drv && ssb_drv->resume)
 152                         err = ssb_drv->resume(ssb_dev);
 153                 if (err)
 154                         goto out;
 155         }
 156 out:
 157         return err;
 158 }
 159
 160 static int ssb_device_suspend(struct device *dev, pm_message_t state)
 161 {
 162         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 163         struct ssb_driver *ssb_drv;
 164         int err = 0;
 165
 166         if (dev->driver) {
 167                 ssb_drv = drv_to_ssb_drv(dev->driver);
 168                 if (ssb_drv && ssb_drv->suspend)
 169                         err = ssb_drv->suspend(ssb_dev, state);
 170                 if (err)
 171                         goto out;
 172         }
 173 out:
 174         return err;
 175 }
 176
 177 int ssb_bus_resume(struct ssb_bus *bus)
 178 {
 179         int err;
 180
 181         /* Reset HW state information in memory, so that HW is
 182          * completely reinitialized. */
 183         bus->mapped_device = NULL;
 184 #ifdef CONFIG_SSB_DRIVER_PCICORE
 185         bus->pcicore.setup_done = 0;
 186 #endif
 187
 188         err = ssb_bus_powerup(bus, 0);
 189         if (err)
 190                 return err;
 191         err = ssb_pcmcia_hardware_setup(bus);
 192         if (err) {
 193                 ssb_bus_may_powerdown(bus);
 194                 return err;
 195         }
 196         ssb_chipco_resume(&bus->chipco);
 197         ssb_bus_may_powerdown(bus);
 198
 199         return 0;
 200 }
 201 EXPORT_SYMBOL(ssb_bus_resume);
 202
 203 int ssb_bus_suspend(struct ssb_bus *bus)
 204 {
 205         ssb_chipco_suspend(&bus->chipco);
 206         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
 207
 208         return 0;
 209 }
 210 EXPORT_SYMBOL(ssb_bus_suspend);
 211
 212 #ifdef CONFIG_SSB_SPROM
 213 /** ssb_devices_freeze - Freeze all devices on the bus.
 214  *
 215  * After freezing no device driver will be handling a device
 216  * on this bus anymore. ssb_devices_thaw() must be called after
 217  * a successful freeze to reactivate the devices.
 218  *
 219  * @bus: The bus.
 220  * @ctx: Context structure. Pass this to ssb_devices_thaw().
 221  */
 222 int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx)
 223 {
 224         struct ssb_device *sdev;
 225         struct ssb_driver *sdrv;
 226         unsigned int i;
 227
 228         memset(ctx, 0, sizeof(*ctx));
 229         ctx->bus = bus;
 230         SSB_WARN_ON(bus->nr_devices > ARRAY_SIZE(ctx->device_frozen));
 231
 232         for (i = 0; i < bus->nr_devices; i++) {
 233                 sdev = ssb_device_get(&bus->devices[i]);
 234
 235                 if (!sdev->dev || !sdev->dev->driver ||
 236                     !device_is_registered(sdev->dev)) {
 237                         ssb_device_put(sdev);
 238                         continue;
 239                 }
 240                 sdrv = drv_to_ssb_drv(sdev->dev->driver);
 241                 if (SSB_WARN_ON(!sdrv->remove))
 242                         continue;
 243                 sdrv->remove(sdev);
 244                 ctx->device_frozen[i] = 1;
 245         }
 246
 247         return 0;
 248 }
 249
 250 /** ssb_devices_thaw - Unfreeze all devices on the bus.
 251  *
 252  * This will re-attach the device drivers and re-init the devices.
 253  *
 254  * @ctx: The context structure from ssb_devices_freeze()
 255  */
 256 int ssb_devices_thaw(struct ssb_freeze_context *ctx)
 257 {
 258         struct ssb_bus *bus = ctx->bus;
 259         struct ssb_device *sdev;
 260         struct ssb_driver *sdrv;
 261         unsigned int i;
 262         int err, result = 0;
 263
 264         for (i = 0; i < bus->nr_devices; i++) {
 265                 if (!ctx->device_frozen[i])
 266                         continue;
 267                 sdev = &bus->devices[i];
 268
 269                 if (SSB_WARN_ON(!sdev->dev || !sdev->dev->driver))
 270                         continue;
 271                 sdrv = drv_to_ssb_drv(sdev->dev->driver);
 272                 if (SSB_WARN_ON(!sdrv || !sdrv->probe))
 273                         continue;
 274
 275                 err = sdrv->probe(sdev, &sdev->id);
 276                 if (err) {
 277                         ssb_printk(KERN_ERR PFX "Failed to thaw device %s\n",
 278                                    dev_name(sdev->dev));
 279                         result = err;
 280                 }
 281                 ssb_device_put(sdev);
 282         }
 283
 284         return result;
 285 }
 286 #endif /* CONFIG_SSB_SPROM */
 287
 288 static void ssb_device_shutdown(struct device *dev)
 289 {
 290         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 291         struct ssb_driver *ssb_drv;
 292
 293         if (!dev->driver)
 294                 return;
 295         ssb_drv = drv_to_ssb_drv(dev->driver);
 296         if (ssb_drv && ssb_drv->shutdown)
 297                 ssb_drv->shutdown(ssb_dev);
 298 }
 299
 300 static int ssb_device_remove(struct device *dev)
 301 {
 302         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 303         struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
 304
 305         if (ssb_drv && ssb_drv->remove)
 306                 ssb_drv->remove(ssb_dev);
 307         ssb_device_put(ssb_dev);
 308
 309         return 0;
 310 }
 311
 312 static int ssb_device_probe(struct device *dev)
 313 {
 314         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 315         struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
 316         int err = 0;
 317
 318         ssb_device_get(ssb_dev);
 319         if (ssb_drv && ssb_drv->probe)
 320                 err = ssb_drv->probe(ssb_dev, &ssb_dev->id);
 321         if (err)
 322                 ssb_device_put(ssb_dev);
 323
 324         return err;
 325 }
 326
 327 static int ssb_match_devid(const struct ssb_device_id *tabid,
 328                            const struct ssb_device_id *devid)
 329 {
 330         if ((tabid->vendor != devid->vendor) &&
 331             tabid->vendor != SSB_ANY_VENDOR)
 332                 return 0;
 333         if ((tabid->coreid != devid->coreid) &&
 334             tabid->coreid != SSB_ANY_ID)
 335                 return 0;
 336         if ((tabid->revision != devid->revision) &&
 337             tabid->revision != SSB_ANY_REV)
 338                 return 0;
 339         return 1;
 340 }
 341
 342 static int ssb_bus_match(struct device *dev, struct device_driver *drv)
 343 {
 344         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 345         struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv);
 346         const struct ssb_device_id *id;
 347
 348         for (id = ssb_drv->id_table;
 349              id->vendor || id->coreid || id->revision;
 350              id++) {
 351                 if (ssb_match_devid(id, &ssb_dev->id))
 352                         return 1; /* found */
 353         }
 354
 355         return 0;
 356 }
 357
 358 static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 359 {
 360         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 361
 362         if (!dev)
 363                 return -ENODEV;
 364
 365         return add_uevent_var(env,
 366                              "MODALIAS=ssb:v%04Xid%04Xrev%02X",
 367                              ssb_dev->id.vendor, ssb_dev->id.coreid,
 368                              ssb_dev->id.revision);
 369 }
 370
 371 #define ssb_config_attr(attrib, field, format_string) \
 372 static ssize_t \
 373 attrib##_show(struct device *dev, struct device_attribute *attr, char *buf) \
 374 { \
 375         return sprintf(buf, format_string, dev_to_ssb_dev(dev)->field); \
 376 }
 377
 378 ssb_config_attr(core_num, core_index, "%u\n")
 379 ssb_config_attr(coreid, id.coreid, "0x%04x\n")
 380 ssb_config_attr(vendor, id.vendor, "0x%04x\n")
 381 ssb_config_attr(revision, id.revision, "%u\n")
 382 ssb_config_attr(irq, irq, "%u\n")
 383 static ssize_t
 384 name_show(struct device *dev, struct device_attribute *attr, char *buf)
 385 {
 386         return sprintf(buf, "%s\n",
 387                        ssb_core_name(dev_to_ssb_dev(dev)->id.coreid));
 388 }
 389
 390 static struct device_attribute ssb_device_attrs[] = {
 391         __ATTR_RO(name),
 392         __ATTR_RO(core_num),
 393         __ATTR_RO(coreid),
 394         __ATTR_RO(vendor),
 395         __ATTR_RO(revision),
 396         __ATTR_RO(irq),
 397         __ATTR_NULL,
 398 };
 399
 400 static struct bus_type ssb_bustype = {
 401         .name           = "ssb",
 402         .match          = ssb_bus_match,
 403         .probe          = ssb_device_probe,
 404         .remove         = ssb_device_remove,
 405         .shutdown       = ssb_device_shutdown,
 406         .suspend        = ssb_device_suspend,
 407         .resume         = ssb_device_resume,
 408         .uevent         = ssb_device_uevent,
 409         .dev_attrs      = ssb_device_attrs,
 410 };
 411
 412 static void ssb_buses_lock(void)
 413 {
 414         /* See the comment at the ssb_is_early_boot definition */
 415         if (!ssb_is_early_boot)
 416                 mutex_lock(&buses_mutex);
 417 }
 418
 419 static void ssb_buses_unlock(void)
 420 {
 421         /* See the comment at the ssb_is_early_boot definition */
 422         if (!ssb_is_early_boot)
 423                 mutex_unlock(&buses_mutex);
 424 }
 425
 426 static void ssb_devices_unregister(struct ssb_bus *bus)
 427 {
 428         struct ssb_device *sdev;
 429         int i;
 430
 431         for (i = bus->nr_devices - 1; i >= 0; i--) {
 432                 sdev = &(bus->devices[i]);
 433                 if (sdev->dev)
 434                         device_unregister(sdev->dev);
 435         }
 436 }
 437
 438 void ssb_bus_unregister(struct ssb_bus *bus)
 439 {
 440         ssb_buses_lock();
 441         ssb_devices_unregister(bus);
 442         list_del(&bus->list);
 443         ssb_buses_unlock();
 444
 445         ssb_pcmcia_exit(bus);
 446         ssb_pci_exit(bus);
 447         ssb_iounmap(bus);
 448 }
 449 EXPORT_SYMBOL(ssb_bus_unregister);
 450
 451 static void ssb_release_dev(struct device *dev)
 452 {
 453         struct __ssb_dev_wrapper *devwrap;
 454
 455         devwrap = container_of(dev, struct __ssb_dev_wrapper, dev);
 456         kfree(devwrap);
 457 }
 458
 459 static int ssb_devices_register(struct ssb_bus *bus)
 460 {
 461         struct ssb_device *sdev;
 462         struct device *dev;
 463         struct __ssb_dev_wrapper *devwrap;
 464         int i, err = 0;
 465         int dev_idx = 0;
 466
 467         for (i = 0; i < bus->nr_devices; i++) {
 468                 sdev = &(bus->devices[i]);
 469
 470                 /* We don't register SSB-system devices to the kernel,
 471                  * as the drivers for them are built into SSB. */
 472                 switch (sdev->id.coreid) {
 473                 case SSB_DEV_CHIPCOMMON:
 474                 case SSB_DEV_PCI:
 475                 case SSB_DEV_PCIE:
 476                 case SSB_DEV_PCMCIA:
 477                 case SSB_DEV_MIPS:
 478                 case SSB_DEV_MIPS_3302:
 479                 case SSB_DEV_EXTIF:
 480                         continue;
 481                 }
 482
 483                 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL);
 484                 if (!devwrap) {
 485                         ssb_printk(KERN_ERR PFX
 486                                    "Could not allocate device\n");
 487                         err = -ENOMEM;
 488                         goto error;
 489                 }
 490                 dev = &devwrap->dev;
 491                 devwrap->sdev = sdev;
 492
 493                 dev->release = ssb_release_dev;
 494                 dev->bus = &ssb_bustype;
 495                 dev_set_name(dev, "ssb%u:%d", bus->busnumber, dev_idx);
 496
 497                 switch (bus->bustype) {
 498                 case SSB_BUSTYPE_PCI:
 499 #ifdef CONFIG_SSB_PCIHOST
 500                         sdev->irq = bus->host_pci->irq;
 501                         dev->parent = &bus->host_pci->dev;
 502                         sdev->dma_dev = dev->parent;
 503 #endif
 504                         break;
 505                 case SSB_BUSTYPE_PCMCIA:
 506 #ifdef CONFIG_SSB_PCMCIAHOST
 507                         sdev->irq = bus->host_pcmcia->irq;
 508                         dev->parent = &bus->host_pcmcia->dev;
 509 #endif
 510                         break;
 511                 case SSB_BUSTYPE_SDIO:
 512 #ifdef CONFIG_SSB_SDIOHOST
 513                         dev->parent = &bus->host_sdio->dev;
 514 #endif
 515                         break;
 516                 case SSB_BUSTYPE_SSB:
 517                         dev->dma_mask = &dev->coherent_dma_mask;
 518                         sdev->dma_dev = dev;
 519                         break;
 520                 }
 521
 522                 sdev->dev = dev;
 523                 err = device_register(dev);
 524                 if (err) {
 525                         ssb_printk(KERN_ERR PFX
 526                                    "Could not register %s\n",
 527                                    dev_name(dev));
 528                         /* Set dev to NULL to not unregister
 529                          * dev on error unwinding. */
 530                         sdev->dev = NULL;
 531                         kfree(devwrap);
 532                         goto error;
 533                 }
 534                 dev_idx++;
 535         }
 536
 537         return 0;
 538 error:
 539         /* Unwind the already registered devices. */
 540         ssb_devices_unregister(bus);
 541         return err;
 542 }
 543
 544 /* Needs ssb_buses_lock() */
 545 static int __devinit ssb_attach_queued_buses(void)
 546 {
 547         struct ssb_bus *bus, *n;
 548         int err = 0;
 549         int drop_them_all = 0;
 550
 551         list_for_each_entry_safe(bus, n, &attach_queue, list) {
 552                 if (drop_them_all) {
 553                         list_del(&bus->list);
 554                         continue;
 555                 }
 556                 /* Can't init the PCIcore in ssb_bus_register(), as that
 557                  * is too early in boot for embedded systems
 558                  * (no udelay() available). So do it here in attach stage.
 559                  */
 560                 err = ssb_bus_powerup(bus, 0);
 561                 if (err)
 562                         goto error;
 563                 ssb_pcicore_init(&bus->pcicore);
 564                 ssb_bus_may_powerdown(bus);
 565
 566                 err = ssb_devices_register(bus);
 567 error:
 568                 if (err) {
 569                         drop_them_all = 1;
 570                         list_del(&bus->list);
 571                         continue;
 572                 }
 573                 list_move_tail(&bus->list, &buses);
 574         }
 575
 576         return err;
 577 }
 578
 579 static u8 ssb_ssb_read8(struct ssb_device *dev, u16 offset)
 580 {
 581         struct ssb_bus *bus = dev->bus;
 582
 583         offset += dev->core_index * SSB_CORE_SIZE;
 584         return readb(bus->mmio + offset);
 585 }
 586
 587 static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset)
 588 {
 589         struct ssb_bus *bus = dev->bus;
 590
 591         offset += dev->core_index * SSB_CORE_SIZE;
 592         return readw(bus->mmio + offset);
 593 }
 594
 595 static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
 596 {
 597         struct ssb_bus *bus = dev->bus;
 598
 599         offset += dev->core_index * SSB_CORE_SIZE;
 600         return readl(bus->mmio + offset);
 601 }
 602
 603 #ifdef CONFIG_SSB_BLOCKIO
 604 static void ssb_ssb_block_read(struct ssb_device *dev, void *buffer,
 605                                size_t count, u16 offset, u8 reg_width)
 606 {
 607         struct ssb_bus *bus = dev->bus;
 608         void __iomem *addr;
 609
 610         offset += dev->core_index * SSB_CORE_SIZE;
 611         addr = bus->mmio + offset;
 612
 613         switch (reg_width) {
 614         case sizeof(u8): {
 615                 u8 *buf = buffer;
 616
 617                 while (count) {
 618                         *buf = __raw_readb(addr);
 619                         buf++;
 620                         count--;
 621                 }
 622                 break;
 623         }
 624         case sizeof(u16): {
 625                 __le16 *buf = buffer;
 626
 627                 SSB_WARN_ON(count & 1);
 628                 while (count) {
 629                         *buf = (__force __le16)__raw_readw(addr);
 630                         buf++;
 631                         count -= 2;
 632                 }
 633                 break;
 634         }
 635         case sizeof(u32): {
 636                 __le32 *buf = buffer;
 637
 638                 SSB_WARN_ON(count & 3);
 639                 while (count) {
 640                         *buf = (__force __le32)__raw_readl(addr);
 641                         buf++;
 642                         count -= 4;
 643                 }
 644                 break;
 645         }
 646         default:
 647                 SSB_WARN_ON(1);
 648         }
 649 }
 650 #endif /* CONFIG_SSB_BLOCKIO */
 651
 652 static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
 653 {
 654         struct ssb_bus *bus = dev->bus;
 655
 656         offset += dev->core_index * SSB_CORE_SIZE;
 657         writeb(value, bus->mmio + offset);
 658 }
 659
 660 static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
 661 {
 662         struct ssb_bus *bus = dev->bus;
 663
 664         offset += dev->core_index * SSB_CORE_SIZE;
 665         writew(value, bus->mmio + offset);
 666 }
 667
 668 static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
 669 {
 670         struct ssb_bus *bus = dev->bus;
 671
 672         offset += dev->core_index * SSB_CORE_SIZE;
 673         writel(value, bus->mmio + offset);
 674 }
 675
 676 #ifdef CONFIG_SSB_BLOCKIO
 677 static void ssb_ssb_block_write(struct ssb_device *dev, const void *buffer,
 678                                 size_t count, u16 offset, u8 reg_width)
 679 {
 680         struct ssb_bus *bus = dev->bus;
 681         void __iomem *addr;
 682
 683         offset += dev->core_index * SSB_CORE_SIZE;
 684         addr = bus->mmio + offset;
 685
 686         switch (reg_width) {
 687         case sizeof(u8): {
 688                 const u8 *buf = buffer;
 689
 690                 while (count) {
 691                         __raw_writeb(*buf, addr);
 692                         buf++;
 693                         count--;
 694                 }
 695                 break;
 696         }
 697         case sizeof(u16): {
 698                 const __le16 *buf = buffer;
 699
 700                 SSB_WARN_ON(count & 1);
 701                 while (count) {
 702                         __raw_writew((__force u16)(*buf), addr);
 703                         buf++;
 704                         count -= 2;
 705                 }
 706                 break;
 707         }
 708         case sizeof(u32): {
 709                 const __le32 *buf = buffer;
 710
 711                 SSB_WARN_ON(count & 3);
 712                 while (count) {
 713                         __raw_writel((__force u32)(*buf), addr);
 714                         buf++;
 715                         count -= 4;
 716                 }
 717                 break;
 718         }
 719         default:
 720                 SSB_WARN_ON(1);
 721         }
 722 }
 723 #endif /* CONFIG_SSB_BLOCKIO */
 724
 725 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
 726 static const struct ssb_bus_ops ssb_ssb_ops = {
 727         .read8          = ssb_ssb_read8,
 728         .read16         = ssb_ssb_read16,
 729         .read32         = ssb_ssb_read32,
 730         .write8         = ssb_ssb_write8,
 731         .write16        = ssb_ssb_write16,
 732         .write32        = ssb_ssb_write32,
 733 #ifdef CONFIG_SSB_BLOCKIO
 734         .block_read     = ssb_ssb_block_read,
 735         .block_write    = ssb_ssb_block_write,
 736 #endif
 737 };
 738
 739 static int ssb_fetch_invariants(struct ssb_bus *bus,
 740                                 ssb_invariants_func_t get_invariants)
 741 {
 742         struct ssb_init_invariants iv;
 743         int err;
 744
 745         memset(&iv, 0, sizeof(iv));
 746         err = get_invariants(bus, &iv);
 747         if (err)
 748                 goto out;
 749         memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
 750         memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
 751         bus->has_cardbus_slot = iv.has_cardbus_slot;
 752 out:
 753         return err;
 754 }
 755
 756 static int __devinit ssb_bus_register(struct ssb_bus *bus,
 757                                       ssb_invariants_func_t get_invariants,
 758                                       unsigned long baseaddr)
 759 {
 760         int err;
 761
 762         spin_lock_init(&bus->bar_lock);
 763         INIT_LIST_HEAD(&bus->list);
 764 #ifdef CONFIG_SSB_EMBEDDED
 765         spin_lock_init(&bus->gpio_lock);
 766 #endif
 767
 768         /* Powerup the bus */
 769         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
 770         if (err)
 771                 goto out;
 772
 773         /* Init SDIO-host device (if any), before the scan */
 774         err = ssb_sdio_init(bus);
 775         if (err)
 776                 goto err_disable_xtal;
 777
 778         ssb_buses_lock();
 779         bus->busnumber = next_busnumber;
 780         /* Scan for devices (cores) */
 781         err = ssb_bus_scan(bus, baseaddr);
 782         if (err)
 783                 goto err_sdio_exit;
 784
 785         /* Init PCI-host device (if any) */
 786         err = ssb_pci_init(bus);
 787         if (err)
 788                 goto err_unmap;
 789         /* Init PCMCIA-host device (if any) */
 790         err = ssb_pcmcia_init(bus);
 791         if (err)
 792                 goto err_pci_exit;
 793
 794         /* Initialize basic system devices (if available) */
 795         err = ssb_bus_powerup(bus, 0);
 796         if (err)
 797                 goto err_pcmcia_exit;
 798         ssb_chipcommon_init(&bus->chipco);
 799         ssb_extif_init(&bus->extif);
 800         ssb_mipscore_init(&bus->mipscore);
 801         err = ssb_gpio_init(bus);
 802         if (err == -ENOTSUPP)
 803                 ssb_dprintk(KERN_DEBUG PFX "GPIO driver not activated\n");
 804         else if (err)
 805                 ssb_dprintk(KERN_ERR PFX
 806                            "Error registering GPIO driver: %i\n", err);
 807         err = ssb_fetch_invariants(bus, get_invariants);
 808         if (err) {
 809                 ssb_bus_may_powerdown(bus);
 810                 goto err_pcmcia_exit;
 811         }
 812         ssb_bus_may_powerdown(bus);
 813
 814         /* Queue it for attach.
 815          * See the comment at the ssb_is_early_boot definition. */
 816         list_add_tail(&bus->list, &attach_queue);
 817         if (!ssb_is_early_boot) {
 818                 /* This is not early boot, so we must attach the bus now */
 819                 err = ssb_attach_queued_buses();
 820                 if (err)
 821                         goto err_dequeue;
 822         }
 823         next_busnumber++;
 824         ssb_buses_unlock();
 825
 826 out:
 827         return err;
 828
 829 err_dequeue:
 830         list_del(&bus->list);
 831 err_pcmcia_exit:
 832         ssb_pcmcia_exit(bus);
 833 err_pci_exit:
 834         ssb_pci_exit(bus);
 835 err_unmap:
 836         ssb_iounmap(bus);
 837 err_sdio_exit:
 838         ssb_sdio_exit(bus);
 839 err_disable_xtal:
 840         ssb_buses_unlock();
 841         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
 842         return err;
 843 }
 844
 845 #ifdef CONFIG_SSB_PCIHOST
 846 int __devinit ssb_bus_pcibus_register(struct ssb_bus *bus,
 847                                       struct pci_dev *host_pci)
 848 {
 849         int err;
 850
 851         bus->bustype = SSB_BUSTYPE_PCI;
 852         bus->host_pci = host_pci;
 853         bus->ops = &ssb_pci_ops;
 854
 855         err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
 856         if (!err) {
 857                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
 858                            "PCI device %s\n", dev_name(&host_pci->dev));
 859         } else {
 860                 ssb_printk(KERN_ERR PFX "Failed to register PCI version"
 861                            " of SSB with error %d\n", err);
 862         }
 863
 864         return err;
 865 }
 866 EXPORT_SYMBOL(ssb_bus_pcibus_register);
 867 #endif /* CONFIG_SSB_PCIHOST */
 868
 869 #ifdef CONFIG_SSB_PCMCIAHOST
 870 int __devinit ssb_bus_pcmciabus_register(struct ssb_bus *bus,
 871                                          struct pcmcia_device *pcmcia_dev,
 872                                          unsigned long baseaddr)
 873 {
 874         int err;
 875
 876         bus->bustype = SSB_BUSTYPE_PCMCIA;
 877         bus->host_pcmcia = pcmcia_dev;
 878         bus->ops = &ssb_pcmcia_ops;
 879
 880         err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
 881         if (!err) {
 882                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
 883                            "PCMCIA device %s\n", pcmcia_dev->devname);
 884         }
 885
 886         return err;
 887 }
 888 EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
 889 #endif /* CONFIG_SSB_PCMCIAHOST */
 890
 891 #ifdef CONFIG_SSB_SDIOHOST
 892 int __devinit ssb_bus_sdiobus_register(struct ssb_bus *bus,
 893                                        struct sdio_func *func,
 894                                        unsigned int quirks)
 895 {
 896         int err;
 897
 898         bus->bustype = SSB_BUSTYPE_SDIO;
 899         bus->host_sdio = func;
 900         bus->ops = &ssb_sdio_ops;
 901         bus->quirks = quirks;
 902
 903         err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0);
 904         if (!err) {
 905                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
 906                            "SDIO device %s\n", sdio_func_id(func));
 907         }
 908
 909         return err;
 910 }
 911 EXPORT_SYMBOL(ssb_bus_sdiobus_register);
 912 #endif /* CONFIG_SSB_PCMCIAHOST */
 913
 914 int __devinit ssb_bus_ssbbus_register(struct ssb_bus *bus,
 915                                       unsigned long baseaddr,
 916                                       ssb_invariants_func_t get_invariants)
 917 {
 918         int err;
 919
 920         bus->bustype = SSB_BUSTYPE_SSB;
 921         bus->ops = &ssb_ssb_ops;
 922
 923         err = ssb_bus_register(bus, get_invariants, baseaddr);
 924         if (!err) {
 925                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found at "
 926                            "address 0x%08lX\n", baseaddr);
 927         }
 928
 929         return err;
 930 }
 931
 932 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
 933 {
 934         drv->drv.name = drv->name;
 935         drv->drv.bus = &ssb_bustype;
 936         drv->drv.owner = owner;
 937
 938         return driver_register(&drv->drv);
 939 }
 940 EXPORT_SYMBOL(__ssb_driver_register);
 941
 942 void ssb_driver_unregister(struct ssb_driver *drv)
 943 {
 944         driver_unregister(&drv->drv);
 945 }
 946 EXPORT_SYMBOL(ssb_driver_unregister);
 947
 948 void ssb_set_devtypedata(struct ssb_device *dev, void *data)
 949 {
 950         struct ssb_bus *bus = dev->bus;
 951         struct ssb_device *ent;
 952         int i;
 953
 954         for (i = 0; i < bus->nr_devices; i++) {
 955                 ent = &(bus->devices[i]);
 956                 if (ent->id.vendor != dev->id.vendor)
 957                         continue;
 958                 if (ent->id.coreid != dev->id.coreid)
 959                         continue;
 960
 961                 ent->devtypedata = data;
 962         }
 963 }
 964 EXPORT_SYMBOL(ssb_set_devtypedata);
 965
 966 static u32 clkfactor_f6_resolve(u32 v)
 967 {
 968         /* map the magic values */
 969         switch (v) {
 970         case SSB_CHIPCO_CLK_F6_2:
 971                 return 2;
 972         case SSB_CHIPCO_CLK_F6_3:
 973                 return 3;
 974         case SSB_CHIPCO_CLK_F6_4:
 975                 return 4;
 976         case SSB_CHIPCO_CLK_F6_5:
 977                 return 5;
 978         case SSB_CHIPCO_CLK_F6_6:
 979                 return 6;
 980         case SSB_CHIPCO_CLK_F6_7:
 981                 return 7;
 982         }
 983         return 0;
 984 }
 985
 986 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
 987 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
 988 {
 989         u32 n1, n2, clock, m1, m2, m3, mc;
 990
 991         n1 = (n & SSB_CHIPCO_CLK_N1);
 992         n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
 993
 994         switch (plltype) {
 995         case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
 996                 if (m & SSB_CHIPCO_CLK_T6_MMASK)
 997                         return SSB_CHIPCO_CLK_T6_M1;
 998                 return SSB_CHIPCO_CLK_T6_M0;
 999         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1000         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1001         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1002         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1003                 n1 = clkfactor_f6_resolve(n1);
1004                 n2 += SSB_CHIPCO_CLK_F5_BIAS;
1005                 break;
1006         case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
1007                 n1 += SSB_CHIPCO_CLK_T2_BIAS;
1008                 n2 += SSB_CHIPCO_CLK_T2_BIAS;
1009                 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
1010                 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
1011                 break;
1012         case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
1013                 return 100000000;
1014         default:
1015                 SSB_WARN_ON(1);
1016         }
1017
1018         switch (plltype) {
1019         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1020         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1021                 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
1022                 break;
1023         default:
1024                 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
1025         }
1026         if (!clock)
1027                 return 0;
1028
1029         m1 = (m & SSB_CHIPCO_CLK_M1);
1030         m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
1031         m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
1032         mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
1033
1034         switch (plltype) {
1035         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1036         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1037         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1038         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1039                 m1 = clkfactor_f6_resolve(m1);
1040                 if ((plltype == SSB_PLLTYPE_1) ||
1041                     (plltype == SSB_PLLTYPE_3))
1042                         m2 += SSB_CHIPCO_CLK_F5_BIAS;
1043                 else
1044                         m2 = clkfactor_f6_resolve(m2);
1045                 m3 = clkfactor_f6_resolve(m3);
1046
1047                 switch (mc) {
1048                 case SSB_CHIPCO_CLK_MC_BYPASS:
1049                         return clock;
1050                 case SSB_CHIPCO_CLK_MC_M1:
1051                         return (clock / m1);
1052                 case SSB_CHIPCO_CLK_MC_M1M2:
1053                         return (clock / (m1 * m2));
1054                 case SSB_CHIPCO_CLK_MC_M1M2M3:
1055                         return (clock / (m1 * m2 * m3));
1056                 case SSB_CHIPCO_CLK_MC_M1M3:
1057                         return (clock / (m1 * m3));
1058                 }
1059                 return 0;
1060         case SSB_PLLTYPE_2:
1061                 m1 += SSB_CHIPCO_CLK_T2_BIAS;
1062                 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
1063                 m3 += SSB_CHIPCO_CLK_T2_BIAS;
1064                 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
1065                 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
1066                 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
1067
1068                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
1069                         clock /= m1;
1070                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
1071                         clock /= m2;
1072                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
1073                         clock /= m3;
1074                 return clock;
1075         default:
1076                 SSB_WARN_ON(1);
1077         }
1078         return 0;
1079 }
1080
1081 /* Get the current speed the backplane is running at */
1082 u32 ssb_clockspeed(struct ssb_bus *bus)
1083 {
1084         u32 rate;
1085         u32 plltype;
1086         u32 clkctl_n, clkctl_m;
1087
1088         if (bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU)
1089                 return ssb_pmu_get_controlclock(&bus->chipco);
1090
1091         if (ssb_extif_available(&bus->extif))
1092                 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
1093                                            &clkctl_n, &clkctl_m);
1094         else if (bus->chipco.dev)
1095                 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
1096                                             &clkctl_n, &clkctl_m);
1097         else
1098                 return 0;
1099
1100         if (bus->chip_id == 0x5365) {
1101                 rate = 100000000;
1102         } else {
1103                 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
1104                 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
1105                         rate /= 2;
1106         }
1107
1108         return rate;
1109 }
1110 EXPORT_SYMBOL(ssb_clockspeed);
1111
1112 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
1113 {
1114         u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
1115
1116         /* The REJECT bit seems to be different for Backplane rev 2.3 */
1117         switch (rev) {
1118         case SSB_IDLOW_SSBREV_22:
1119         case SSB_IDLOW_SSBREV_24:
1120         case SSB_IDLOW_SSBREV_26:
1121                 return SSB_TMSLOW_REJECT;
1122         case SSB_IDLOW_SSBREV_23:
1123                 return SSB_TMSLOW_REJECT_23;
1124         case SSB_IDLOW_SSBREV_25:     /* TODO - find the proper REJECT bit */
1125         case SSB_IDLOW_SSBREV_27:     /* same here */
1126                 return SSB_TMSLOW_REJECT;       /* this is a guess */
1127         default:
1128                 printk(KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
1129                 WARN_ON(1);
1130         }
1131         return (SSB_TMSLOW_REJECT | SSB_TMSLOW_REJECT_23);
1132 }
1133
1134 int ssb_device_is_enabled(struct ssb_device *dev)
1135 {
1136         u32 val;
1137         u32 reject;
1138
1139         reject = ssb_tmslow_reject_bitmask(dev);
1140         val = ssb_read32(dev, SSB_TMSLOW);
1141         val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1142
1143         return (val == SSB_TMSLOW_CLOCK);
1144 }
1145 EXPORT_SYMBOL(ssb_device_is_enabled);
1146
1147 static void ssb_flush_tmslow(struct ssb_device *dev)
1148 {
1149         /* Make _really_ sure the device has finished the TMSLOW
1150          * register write transaction, as we risk running into
1151          * a machine check exception otherwise.
1152          * Do this by reading the register back to commit the
1153          * PCI write and delay an additional usec for the device
1154          * to react to the change. */
1155         ssb_read32(dev, SSB_TMSLOW);
1156         udelay(1);
1157 }
1158
1159 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1160 {
1161         u32 val;
1162
1163         ssb_device_disable(dev, core_specific_flags);
1164         ssb_write32(dev, SSB_TMSLOW,
1165                     SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1166                     SSB_TMSLOW_FGC | core_specific_flags);
1167         ssb_flush_tmslow(dev);
1168
1169         /* Clear SERR if set. This is a hw bug workaround. */
1170         if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1171                 ssb_write32(dev, SSB_TMSHIGH, 0);
1172
1173         val = ssb_read32(dev, SSB_IMSTATE);
1174         if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1175                 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1176                 ssb_write32(dev, SSB_IMSTATE, val);
1177         }
1178
1179         ssb_write32(dev, SSB_TMSLOW,
1180                     SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1181                     core_specific_flags);
1182         ssb_flush_tmslow(dev);
1183
1184         ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1185                     core_specific_flags);
1186         ssb_flush_tmslow(dev);
1187 }
1188 EXPORT_SYMBOL(ssb_device_enable);
1189
1190 /* Wait for bitmask in a register to get set or cleared.
1191  * timeout is in units of ten-microseconds */
1192 static int ssb_wait_bits(struct ssb_device *dev, u16 reg, u32 bitmask,
1193                          int timeout, int set)
1194 {
1195         int i;
1196         u32 val;
1197
1198         for (i = 0; i < timeout; i++) {
1199                 val = ssb_read32(dev, reg);
1200                 if (set) {
1201                         if ((val & bitmask) == bitmask)
1202                                 return 0;
1203                 } else {
1204                         if (!(val & bitmask))
1205                                 return 0;
1206                 }
1207                 udelay(10);
1208         }
1209         printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1210                             "register %04X to %s.\n",
1211                bitmask, reg, (set ? "set" : "clear"));
1212
1213         return -ETIMEDOUT;
1214 }
1215
1216 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1217 {
1218         u32 reject, val;
1219
1220         if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1221                 return;
1222
1223         reject = ssb_tmslow_reject_bitmask(dev);
1224
1225         if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_CLOCK) {
1226                 ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1227                 ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1);
1228                 ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
1229
1230                 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1231                         val = ssb_read32(dev, SSB_IMSTATE);
1232                         val |= SSB_IMSTATE_REJECT;
1233                         ssb_write32(dev, SSB_IMSTATE, val);
1234                         ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000,
1235                                       0);
1236                 }
1237
1238                 ssb_write32(dev, SSB_TMSLOW,
1239                         SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1240                         reject | SSB_TMSLOW_RESET |
1241                         core_specific_flags);
1242                 ssb_flush_tmslow(dev);
1243
1244                 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1245                         val = ssb_read32(dev, SSB_IMSTATE);
1246                         val &= ~SSB_IMSTATE_REJECT;
1247                         ssb_write32(dev, SSB_IMSTATE, val);
1248                 }
1249         }
1250
1251         ssb_write32(dev, SSB_TMSLOW,
1252                     reject | SSB_TMSLOW_RESET |
1253                     core_specific_flags);
1254         ssb_flush_tmslow(dev);
1255 }
1256 EXPORT_SYMBOL(ssb_device_disable);
1257
1258 /* Some chipsets need routing known for PCIe and 64-bit DMA */
1259 static bool ssb_dma_translation_special_bit(struct ssb_device *dev)
1260 {
1261         u16 chip_id = dev->bus->chip_id;
1262
1263         if (dev->id.coreid == SSB_DEV_80211) {
1264                 return (chip_id == 0x4322 || chip_id == 43221 ||
1265                         chip_id == 43231 || chip_id == 43222);
1266         }
1267
1268         return 0;
1269 }
1270
1271 u32 ssb_dma_translation(struct ssb_device *dev)
1272 {
1273         switch (dev->bus->bustype) {
1274         case SSB_BUSTYPE_SSB:
1275                 return 0;
1276         case SSB_BUSTYPE_PCI:
1277                 if (pci_is_pcie(dev->bus->host_pci) &&
1278                     ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_DMA64) {
1279                         return SSB_PCIE_DMA_H32;
1280                 } else {
1281                         if (ssb_dma_translation_special_bit(dev))
1282                                 return SSB_PCIE_DMA_H32;
1283                         else
1284                                 return SSB_PCI_DMA;
1285                 }
1286         default:
1287                 __ssb_dma_not_implemented(dev);
1288         }
1289         return 0;
1290 }
1291 EXPORT_SYMBOL(ssb_dma_translation);
1292
1293 int ssb_bus_may_powerdown(struct ssb_bus *bus)
1294 {
1295         struct ssb_chipcommon *cc;
1296         int err = 0;
1297
1298         /* On buses where more than one core may be working
1299          * at a time, we must not powerdown stuff if there are
1300          * still cores that may want to run. */
1301         if (bus->bustype == SSB_BUSTYPE_SSB)
1302                 goto out;
1303
1304         cc = &bus->chipco;
1305
1306         if (!cc->dev)
1307                 goto out;
1308         if (cc->dev->id.revision < 5)
1309                 goto out;
1310
1311         ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1312         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1313         if (err)
1314                 goto error;
1315 out:
1316 #ifdef CONFIG_SSB_DEBUG
1317         bus->powered_up = 0;
1318 #endif
1319         return err;
1320 error:
1321         ssb_printk(KERN_ERR PFX "Bus powerdown failed\n");
1322         goto out;
1323 }
1324 EXPORT_SYMBOL(ssb_bus_may_powerdown);
1325
1326 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1327 {
1328         int err;
1329         enum ssb_clkmode mode;
1330
1331         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1332         if (err)
1333                 goto error;
1334
1335 #ifdef CONFIG_SSB_DEBUG
1336         bus->powered_up = 1;
1337 #endif
1338
1339         mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1340         ssb_chipco_set_clockmode(&bus->chipco, mode);
1341
1342         return 0;
1343 error:
1344         ssb_printk(KERN_ERR PFX "Bus powerup failed\n");
1345         return err;
1346 }
1347 EXPORT_SYMBOL(ssb_bus_powerup);
1348
1349 static void ssb_broadcast_value(struct ssb_device *dev,
1350                                 u32 address, u32 data)
1351 {
1352 #ifdef CONFIG_SSB_DRIVER_PCICORE
1353         /* This is used for both, PCI and ChipCommon core, so be careful. */
1354         BUILD_BUG_ON(SSB_PCICORE_BCAST_ADDR != SSB_CHIPCO_BCAST_ADDR);
1355         BUILD_BUG_ON(SSB_PCICORE_BCAST_DATA != SSB_CHIPCO_BCAST_DATA);
1356 #endif
1357
1358         ssb_write32(dev, SSB_CHIPCO_BCAST_ADDR, address);
1359         ssb_read32(dev, SSB_CHIPCO_BCAST_ADDR); /* flush */
1360         ssb_write32(dev, SSB_CHIPCO_BCAST_DATA, data);
1361         ssb_read32(dev, SSB_CHIPCO_BCAST_DATA); /* flush */
1362 }
1363
1364 void ssb_commit_settings(struct ssb_bus *bus)
1365 {
1366         struct ssb_device *dev;
1367
1368 #ifdef CONFIG_SSB_DRIVER_PCICORE
1369         dev = bus->chipco.dev ? bus->chipco.dev : bus->pcicore.dev;
1370 #else
1371         dev = bus->chipco.dev;
1372 #endif
1373         if (WARN_ON(!dev))
1374                 return;
1375         /* This forces an update of the cached registers. */
1376         ssb_broadcast_value(dev, 0xFD8, 0);
1377 }
1378 EXPORT_SYMBOL(ssb_commit_settings);
1379
1380 u32 ssb_admatch_base(u32 adm)
1381 {
1382         u32 base = 0;
1383
1384         switch (adm & SSB_ADM_TYPE) {
1385         case SSB_ADM_TYPE0:
1386                 base = (adm & SSB_ADM_BASE0);
1387                 break;
1388         case SSB_ADM_TYPE1:
1389                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1390                 base = (adm & SSB_ADM_BASE1);
1391                 break;
1392         case SSB_ADM_TYPE2:
1393                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1394                 base = (adm & SSB_ADM_BASE2);
1395                 break;
1396         default:
1397                 SSB_WARN_ON(1);
1398         }
1399
1400         return base;
1401 }
1402 EXPORT_SYMBOL(ssb_admatch_base);
1403
1404 u32 ssb_admatch_size(u32 adm)
1405 {
1406         u32 size = 0;
1407
1408         switch (adm & SSB_ADM_TYPE) {
1409         case SSB_ADM_TYPE0:
1410                 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1411                 break;
1412         case SSB_ADM_TYPE1:
1413                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1414                 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1415                 break;
1416         case SSB_ADM_TYPE2:
1417                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1418                 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1419                 break;
1420         default:
1421                 SSB_WARN_ON(1);
1422         }
1423         size = (1 << (size + 1));
1424
1425         return size;
1426 }
1427 EXPORT_SYMBOL(ssb_admatch_size);
1428
1429 static int __init ssb_modinit(void)
1430 {
1431         int err;
1432
1433         /* See the comment at the ssb_is_early_boot definition */
1434         ssb_is_early_boot = 0;
1435         err = bus_register(&ssb_bustype);
1436         if (err)
1437                 return err;
1438
1439         /* Maybe we already registered some buses at early boot.
1440          * Check for this and attach them
1441          */
1442         ssb_buses_lock();
1443         err = ssb_attach_queued_buses();
1444         ssb_buses_unlock();
1445         if (err) {
1446                 bus_unregister(&ssb_bustype);
1447                 goto out;
1448         }
1449
1450         err = b43_pci_ssb_bridge_init();
1451         if (err) {
1452                 ssb_printk(KERN_ERR "Broadcom 43xx PCI-SSB-bridge "
1453                            "initialization failed\n");
1454                 /* don't fail SSB init because of this */
1455                 err = 0;
1456         }
1457         err = ssb_gige_init();
1458         if (err) {
1459                 ssb_printk(KERN_ERR "SSB Broadcom Gigabit Ethernet "
1460                            "driver initialization failed\n");
1461                 /* don't fail SSB init because of this */
1462                 err = 0;
1463         }
1464 out:
1465         return err;
1466 }
1467 /* ssb must be initialized after PCI but before the ssb drivers.
1468  * That means we must use some initcall between subsys_initcall
1469  * and device_initcall. */
1470 fs_initcall(ssb_modinit);
1471
1472 static void __exit ssb_modexit(void)
1473 {
1474         ssb_gige_exit();
1475         b43_pci_ssb_bridge_exit();
1476         bus_unregister(&ssb_bustype);
1477 }
1478 module_exit(ssb_modexit)