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 static DEFINE_MUTEX(buses_mutex);
  42
  43 /* There are differences in the codeflow, if the bus is
  44  * initialized from early boot, as various needed services
  45  * are not available early. This is a mechanism to delay
  46  * these initializations to after early boot has finished.
  47  * It's also used to avoid mutex locking, as that's not
  48  * available and needed early. */
  49 static bool ssb_is_early_boot = 1;
  50
  51 static void ssb_buses_lock(void);
  52 static void ssb_buses_unlock(void);
  53
  54
  55 #ifdef CONFIG_SSB_PCIHOST
  56 struct ssb_bus *ssb_pci_dev_to_bus(struct pci_dev *pdev)
  57 {
  58         struct ssb_bus *bus;
  59
  60         ssb_buses_lock();
  61         list_for_each_entry(bus, &buses, list) {
  62                 if (bus->bustype == SSB_BUSTYPE_PCI &&
  63                     bus->host_pci == pdev)
  64                         goto found;
  65         }
  66         bus = NULL;
  67 found:
  68         ssb_buses_unlock();
  69
  70         return bus;
  71 }
  72 #endif /* CONFIG_SSB_PCIHOST */
  73
  74 #ifdef CONFIG_SSB_PCMCIAHOST
  75 struct ssb_bus *ssb_pcmcia_dev_to_bus(struct pcmcia_device *pdev)
  76 {
  77         struct ssb_bus *bus;
  78
  79         ssb_buses_lock();
  80         list_for_each_entry(bus, &buses, list) {
  81                 if (bus->bustype == SSB_BUSTYPE_PCMCIA &&
  82                     bus->host_pcmcia == pdev)
  83                         goto found;
  84         }
  85         bus = NULL;
  86 found:
  87         ssb_buses_unlock();
  88
  89         return bus;
  90 }
  91 #endif /* CONFIG_SSB_PCMCIAHOST */
  92
  93 #ifdef CONFIG_SSB_SDIOHOST
  94 struct ssb_bus *ssb_sdio_func_to_bus(struct sdio_func *func)
  95 {
  96         struct ssb_bus *bus;
  97
  98         ssb_buses_lock();
  99         list_for_each_entry(bus, &buses, list) {
 100                 if (bus->bustype == SSB_BUSTYPE_SDIO &&
 101                     bus->host_sdio == func)
 102                         goto found;
 103         }
 104         bus = NULL;
 105 found:
 106         ssb_buses_unlock();
 107
 108         return bus;
 109 }
 110 #endif /* CONFIG_SSB_SDIOHOST */
 111
 112 int ssb_for_each_bus_call(unsigned long data,
 113                           int (*func)(struct ssb_bus *bus, unsigned long data))
 114 {
 115         struct ssb_bus *bus;
 116         int res;
 117
 118         ssb_buses_lock();
 119         list_for_each_entry(bus, &buses, list) {
 120                 res = func(bus, data);
 121                 if (res >= 0) {
 122                         ssb_buses_unlock();
 123                         return res;
 124                 }
 125         }
 126         ssb_buses_unlock();
 127
 128         return -ENODEV;
 129 }
 130
 131 static struct ssb_device *ssb_device_get(struct ssb_device *dev)
 132 {
 133         if (dev)
 134                 get_device(dev->dev);
 135         return dev;
 136 }
 137
 138 static void ssb_device_put(struct ssb_device *dev)
 139 {
 140         if (dev)
 141                 put_device(dev->dev);
 142 }
 143
 144 static int ssb_device_resume(struct device *dev)
 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->resume)
 153                         err = ssb_drv->resume(ssb_dev);
 154                 if (err)
 155                         goto out;
 156         }
 157 out:
 158         return err;
 159 }
 160
 161 static int ssb_device_suspend(struct device *dev, pm_message_t state)
 162 {
 163         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 164         struct ssb_driver *ssb_drv;
 165         int err = 0;
 166
 167         if (dev->driver) {
 168                 ssb_drv = drv_to_ssb_drv(dev->driver);
 169                 if (ssb_drv && ssb_drv->suspend)
 170                         err = ssb_drv->suspend(ssb_dev, state);
 171                 if (err)
 172                         goto out;
 173         }
 174 out:
 175         return err;
 176 }
 177
 178 int ssb_bus_resume(struct ssb_bus *bus)
 179 {
 180         int err;
 181
 182         /* Reset HW state information in memory, so that HW is
 183          * completely reinitialized. */
 184         bus->mapped_device = NULL;
 185 #ifdef CONFIG_SSB_DRIVER_PCICORE
 186         bus->pcicore.setup_done = 0;
 187 #endif
 188
 189         err = ssb_bus_powerup(bus, 0);
 190         if (err)
 191                 return err;
 192         err = ssb_pcmcia_hardware_setup(bus);
 193         if (err) {
 194                 ssb_bus_may_powerdown(bus);
 195                 return err;
 196         }
 197         ssb_chipco_resume(&bus->chipco);
 198         ssb_bus_may_powerdown(bus);
 199
 200         return 0;
 201 }
 202 EXPORT_SYMBOL(ssb_bus_resume);
 203
 204 int ssb_bus_suspend(struct ssb_bus *bus)
 205 {
 206         ssb_chipco_suspend(&bus->chipco);
 207         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
 208
 209         return 0;
 210 }
 211 EXPORT_SYMBOL(ssb_bus_suspend);
 212
 213 #ifdef CONFIG_SSB_SPROM
 214 /** ssb_devices_freeze - Freeze all devices on the bus.
 215  *
 216  * After freezing no device driver will be handling a device
 217  * on this bus anymore. ssb_devices_thaw() must be called after
 218  * a successful freeze to reactivate the devices.
 219  *
 220  * @bus: The bus.
 221  * @ctx: Context structure. Pass this to ssb_devices_thaw().
 222  */
 223 int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx)
 224 {
 225         struct ssb_device *sdev;
 226         struct ssb_driver *sdrv;
 227         unsigned int i;
 228
 229         memset(ctx, 0, sizeof(*ctx));
 230         ctx->bus = bus;
 231         SSB_WARN_ON(bus->nr_devices > ARRAY_SIZE(ctx->device_frozen));
 232
 233         for (i = 0; i < bus->nr_devices; i++) {
 234                 sdev = ssb_device_get(&bus->devices[i]);
 235
 236                 if (!sdev->dev || !sdev->dev->driver ||
 237                     !device_is_registered(sdev->dev)) {
 238                         ssb_device_put(sdev);
 239                         continue;
 240                 }
 241                 sdrv = drv_to_ssb_drv(sdev->dev->driver);
 242                 if (SSB_WARN_ON(!sdrv->remove))
 243                         continue;
 244                 sdrv->remove(sdev);
 245                 ctx->device_frozen[i] = 1;
 246         }
 247
 248         return 0;
 249 }
 250
 251 /** ssb_devices_thaw - Unfreeze all devices on the bus.
 252  *
 253  * This will re-attach the device drivers and re-init the devices.
 254  *
 255  * @ctx: The context structure from ssb_devices_freeze()
 256  */
 257 int ssb_devices_thaw(struct ssb_freeze_context *ctx)
 258 {
 259         struct ssb_bus *bus = ctx->bus;
 260         struct ssb_device *sdev;
 261         struct ssb_driver *sdrv;
 262         unsigned int i;
 263         int err, result = 0;
 264
 265         for (i = 0; i < bus->nr_devices; i++) {
 266                 if (!ctx->device_frozen[i])
 267                         continue;
 268                 sdev = &bus->devices[i];
 269
 270                 if (SSB_WARN_ON(!sdev->dev || !sdev->dev->driver))
 271                         continue;
 272                 sdrv = drv_to_ssb_drv(sdev->dev->driver);
 273                 if (SSB_WARN_ON(!sdrv || !sdrv->probe))
 274                         continue;
 275
 276                 err = sdrv->probe(sdev, &sdev->id);
 277                 if (err) {
 278                         ssb_printk(KERN_ERR PFX "Failed to thaw device %s\n",
 279                                    dev_name(sdev->dev));
 280                         result = err;
 281                 }
 282                 ssb_device_put(sdev);
 283         }
 284
 285         return result;
 286 }
 287 #endif /* CONFIG_SSB_SPROM */
 288
 289 static void ssb_device_shutdown(struct device *dev)
 290 {
 291         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 292         struct ssb_driver *ssb_drv;
 293
 294         if (!dev->driver)
 295                 return;
 296         ssb_drv = drv_to_ssb_drv(dev->driver);
 297         if (ssb_drv && ssb_drv->shutdown)
 298                 ssb_drv->shutdown(ssb_dev);
 299 }
 300
 301 static int ssb_device_remove(struct device *dev)
 302 {
 303         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 304         struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
 305
 306         if (ssb_drv && ssb_drv->remove)
 307                 ssb_drv->remove(ssb_dev);
 308         ssb_device_put(ssb_dev);
 309
 310         return 0;
 311 }
 312
 313 static int ssb_device_probe(struct device *dev)
 314 {
 315         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 316         struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
 317         int err = 0;
 318
 319         ssb_device_get(ssb_dev);
 320         if (ssb_drv && ssb_drv->probe)
 321                 err = ssb_drv->probe(ssb_dev, &ssb_dev->id);
 322         if (err)
 323                 ssb_device_put(ssb_dev);
 324
 325         return err;
 326 }
 327
 328 static int ssb_match_devid(const struct ssb_device_id *tabid,
 329                            const struct ssb_device_id *devid)
 330 {
 331         if ((tabid->vendor != devid->vendor) &&
 332             tabid->vendor != SSB_ANY_VENDOR)
 333                 return 0;
 334         if ((tabid->coreid != devid->coreid) &&
 335             tabid->coreid != SSB_ANY_ID)
 336                 return 0;
 337         if ((tabid->revision != devid->revision) &&
 338             tabid->revision != SSB_ANY_REV)
 339                 return 0;
 340         return 1;
 341 }
 342
 343 static int ssb_bus_match(struct device *dev, struct device_driver *drv)
 344 {
 345         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 346         struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv);
 347         const struct ssb_device_id *id;
 348
 349         for (id = ssb_drv->id_table;
 350              id->vendor || id->coreid || id->revision;
 351              id++) {
 352                 if (ssb_match_devid(id, &ssb_dev->id))
 353                         return 1; /* found */
 354         }
 355
 356         return 0;
 357 }
 358
 359 static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 360 {
 361         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 362
 363         if (!dev)
 364                 return -ENODEV;
 365
 366         return add_uevent_var(env,
 367                              "MODALIAS=ssb:v%04Xid%04Xrev%02X",
 368                              ssb_dev->id.vendor, ssb_dev->id.coreid,
 369                              ssb_dev->id.revision);
 370 }
 371
 372 #define ssb_config_attr(attrib, field, format_string) \
 373 static ssize_t \
 374 attrib##_show(struct device *dev, struct device_attribute *attr, char *buf) \
 375 { \
 376         return sprintf(buf, format_string, dev_to_ssb_dev(dev)->field); \
 377 }
 378
 379 ssb_config_attr(core_num, core_index, "%u\n")
 380 ssb_config_attr(coreid, id.coreid, "0x%04x\n")
 381 ssb_config_attr(vendor, id.vendor, "0x%04x\n")
 382 ssb_config_attr(revision, id.revision, "%u\n")
 383 ssb_config_attr(irq, irq, "%u\n")
 384 static ssize_t
 385 name_show(struct device *dev, struct device_attribute *attr, char *buf)
 386 {
 387         return sprintf(buf, "%s\n",
 388                        ssb_core_name(dev_to_ssb_dev(dev)->id.coreid));
 389 }
 390
 391 static struct device_attribute ssb_device_attrs[] = {
 392         __ATTR_RO(name),
 393         __ATTR_RO(core_num),
 394         __ATTR_RO(coreid),
 395         __ATTR_RO(vendor),
 396         __ATTR_RO(revision),
 397         __ATTR_RO(irq),
 398         __ATTR_NULL,
 399 };
 400
 401 static struct bus_type ssb_bustype = {
 402         .name           = "ssb",
 403         .match          = ssb_bus_match,
 404         .probe          = ssb_device_probe,
 405         .remove         = ssb_device_remove,
 406         .shutdown       = ssb_device_shutdown,
 407         .suspend        = ssb_device_suspend,
 408         .resume         = ssb_device_resume,
 409         .uevent         = ssb_device_uevent,
 410         .dev_attrs      = ssb_device_attrs,
 411 };
 412
 413 static void ssb_buses_lock(void)
 414 {
 415         /* See the comment at the ssb_is_early_boot definition */
 416         if (!ssb_is_early_boot)
 417                 mutex_lock(&buses_mutex);
 418 }
 419
 420 static void ssb_buses_unlock(void)
 421 {
 422         /* See the comment at the ssb_is_early_boot definition */
 423         if (!ssb_is_early_boot)
 424                 mutex_unlock(&buses_mutex);
 425 }
 426
 427 static void ssb_devices_unregister(struct ssb_bus *bus)
 428 {
 429         struct ssb_device *sdev;
 430         int i;
 431
 432         for (i = bus->nr_devices - 1; i >= 0; i--) {
 433                 sdev = &(bus->devices[i]);
 434                 if (sdev->dev)
 435                         device_unregister(sdev->dev);
 436         }
 437
 438 #ifdef CONFIG_SSB_EMBEDDED
 439         if (bus->bustype == SSB_BUSTYPE_SSB)
 440                 platform_device_unregister(bus->watchdog);
 441 #endif
 442 }
 443
 444 void ssb_bus_unregister(struct ssb_bus *bus)
 445 {
 446         ssb_buses_lock();
 447         ssb_devices_unregister(bus);
 448         list_del(&bus->list);
 449         ssb_buses_unlock();
 450
 451         ssb_pcmcia_exit(bus);
 452         ssb_pci_exit(bus);
 453         ssb_iounmap(bus);
 454 }
 455 EXPORT_SYMBOL(ssb_bus_unregister);
 456
 457 static void ssb_release_dev(struct device *dev)
 458 {
 459         struct __ssb_dev_wrapper *devwrap;
 460
 461         devwrap = container_of(dev, struct __ssb_dev_wrapper, dev);
 462         kfree(devwrap);
 463 }
 464
 465 static int ssb_devices_register(struct ssb_bus *bus)
 466 {
 467         struct ssb_device *sdev;
 468         struct device *dev;
 469         struct __ssb_dev_wrapper *devwrap;
 470         int i, err = 0;
 471         int dev_idx = 0;
 472
 473         for (i = 0; i < bus->nr_devices; i++) {
 474                 sdev = &(bus->devices[i]);
 475
 476                 /* We don't register SSB-system devices to the kernel,
 477                  * as the drivers for them are built into SSB. */
 478                 switch (sdev->id.coreid) {
 479                 case SSB_DEV_CHIPCOMMON:
 480                 case SSB_DEV_PCI:
 481                 case SSB_DEV_PCIE:
 482                 case SSB_DEV_PCMCIA:
 483                 case SSB_DEV_MIPS:
 484                 case SSB_DEV_MIPS_3302:
 485                 case SSB_DEV_EXTIF:
 486                         continue;
 487                 }
 488
 489                 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL);
 490                 if (!devwrap) {
 491                         ssb_printk(KERN_ERR PFX
 492                                    "Could not allocate device\n");
 493                         err = -ENOMEM;
 494                         goto error;
 495                 }
 496                 dev = &devwrap->dev;
 497                 devwrap->sdev = sdev;
 498
 499                 dev->release = ssb_release_dev;
 500                 dev->bus = &ssb_bustype;
 501                 dev_set_name(dev, "ssb%u:%d", bus->busnumber, dev_idx);
 502
 503                 switch (bus->bustype) {
 504                 case SSB_BUSTYPE_PCI:
 505 #ifdef CONFIG_SSB_PCIHOST
 506                         sdev->irq = bus->host_pci->irq;
 507                         dev->parent = &bus->host_pci->dev;
 508                         sdev->dma_dev = dev->parent;
 509 #endif
 510                         break;
 511                 case SSB_BUSTYPE_PCMCIA:
 512 #ifdef CONFIG_SSB_PCMCIAHOST
 513                         sdev->irq = bus->host_pcmcia->irq;
 514                         dev->parent = &bus->host_pcmcia->dev;
 515 #endif
 516                         break;
 517                 case SSB_BUSTYPE_SDIO:
 518 #ifdef CONFIG_SSB_SDIOHOST
 519                         dev->parent = &bus->host_sdio->dev;
 520 #endif
 521                         break;
 522                 case SSB_BUSTYPE_SSB:
 523                         dev->dma_mask = &dev->coherent_dma_mask;
 524                         sdev->dma_dev = dev;
 525                         break;
 526                 }
 527
 528                 sdev->dev = dev;
 529                 err = device_register(dev);
 530                 if (err) {
 531                         ssb_printk(KERN_ERR PFX
 532                                    "Could not register %s\n",
 533                                    dev_name(dev));
 534                         /* Set dev to NULL to not unregister
 535                          * dev on error unwinding. */
 536                         sdev->dev = NULL;
 537                         kfree(devwrap);
 538                         goto error;
 539                 }
 540                 dev_idx++;
 541         }
 542
 543         return 0;
 544 error:
 545         /* Unwind the already registered devices. */
 546         ssb_devices_unregister(bus);
 547         return err;
 548 }
 549
 550 /* Needs ssb_buses_lock() */
 551 static int __devinit ssb_attach_queued_buses(void)
 552 {
 553         struct ssb_bus *bus, *n;
 554         int err = 0;
 555         int drop_them_all = 0;
 556
 557         list_for_each_entry_safe(bus, n, &attach_queue, list) {
 558                 if (drop_them_all) {
 559                         list_del(&bus->list);
 560                         continue;
 561                 }
 562                 /* Can't init the PCIcore in ssb_bus_register(), as that
 563                  * is too early in boot for embedded systems
 564                  * (no udelay() available). So do it here in attach stage.
 565                  */
 566                 err = ssb_bus_powerup(bus, 0);
 567                 if (err)
 568                         goto error;
 569                 ssb_pcicore_init(&bus->pcicore);
 570                 if (bus->bustype == SSB_BUSTYPE_SSB)
 571                         ssb_watchdog_register(bus);
 572                 ssb_bus_may_powerdown(bus);
 573
 574                 err = ssb_devices_register(bus);
 575 error:
 576                 if (err) {
 577                         drop_them_all = 1;
 578                         list_del(&bus->list);
 579                         continue;
 580                 }
 581                 list_move_tail(&bus->list, &buses);
 582         }
 583
 584         return err;
 585 }
 586
 587 static u8 ssb_ssb_read8(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 readb(bus->mmio + offset);
 593 }
 594
 595 static u16 ssb_ssb_read16(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 readw(bus->mmio + offset);
 601 }
 602
 603 static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
 604 {
 605         struct ssb_bus *bus = dev->bus;
 606
 607         offset += dev->core_index * SSB_CORE_SIZE;
 608         return readl(bus->mmio + offset);
 609 }
 610
 611 #ifdef CONFIG_SSB_BLOCKIO
 612 static void ssb_ssb_block_read(struct ssb_device *dev, void *buffer,
 613                                size_t count, u16 offset, u8 reg_width)
 614 {
 615         struct ssb_bus *bus = dev->bus;
 616         void __iomem *addr;
 617
 618         offset += dev->core_index * SSB_CORE_SIZE;
 619         addr = bus->mmio + offset;
 620
 621         switch (reg_width) {
 622         case sizeof(u8): {
 623                 u8 *buf = buffer;
 624
 625                 while (count) {
 626                         *buf = __raw_readb(addr);
 627                         buf++;
 628                         count--;
 629                 }
 630                 break;
 631         }
 632         case sizeof(u16): {
 633                 __le16 *buf = buffer;
 634
 635                 SSB_WARN_ON(count & 1);
 636                 while (count) {
 637                         *buf = (__force __le16)__raw_readw(addr);
 638                         buf++;
 639                         count -= 2;
 640                 }
 641                 break;
 642         }
 643         case sizeof(u32): {
 644                 __le32 *buf = buffer;
 645
 646                 SSB_WARN_ON(count & 3);
 647                 while (count) {
 648                         *buf = (__force __le32)__raw_readl(addr);
 649                         buf++;
 650                         count -= 4;
 651                 }
 652                 break;
 653         }
 654         default:
 655                 SSB_WARN_ON(1);
 656         }
 657 }
 658 #endif /* CONFIG_SSB_BLOCKIO */
 659
 660 static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
 661 {
 662         struct ssb_bus *bus = dev->bus;
 663
 664         offset += dev->core_index * SSB_CORE_SIZE;
 665         writeb(value, bus->mmio + offset);
 666 }
 667
 668 static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
 669 {
 670         struct ssb_bus *bus = dev->bus;
 671
 672         offset += dev->core_index * SSB_CORE_SIZE;
 673         writew(value, bus->mmio + offset);
 674 }
 675
 676 static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
 677 {
 678         struct ssb_bus *bus = dev->bus;
 679
 680         offset += dev->core_index * SSB_CORE_SIZE;
 681         writel(value, bus->mmio + offset);
 682 }
 683
 684 #ifdef CONFIG_SSB_BLOCKIO
 685 static void ssb_ssb_block_write(struct ssb_device *dev, const void *buffer,
 686                                 size_t count, u16 offset, u8 reg_width)
 687 {
 688         struct ssb_bus *bus = dev->bus;
 689         void __iomem *addr;
 690
 691         offset += dev->core_index * SSB_CORE_SIZE;
 692         addr = bus->mmio + offset;
 693
 694         switch (reg_width) {
 695         case sizeof(u8): {
 696                 const u8 *buf = buffer;
 697
 698                 while (count) {
 699                         __raw_writeb(*buf, addr);
 700                         buf++;
 701                         count--;
 702                 }
 703                 break;
 704         }
 705         case sizeof(u16): {
 706                 const __le16 *buf = buffer;
 707
 708                 SSB_WARN_ON(count & 1);
 709                 while (count) {
 710                         __raw_writew((__force u16)(*buf), addr);
 711                         buf++;
 712                         count -= 2;
 713                 }
 714                 break;
 715         }
 716         case sizeof(u32): {
 717                 const __le32 *buf = buffer;
 718
 719                 SSB_WARN_ON(count & 3);
 720                 while (count) {
 721                         __raw_writel((__force u32)(*buf), addr);
 722                         buf++;
 723                         count -= 4;
 724                 }
 725                 break;
 726         }
 727         default:
 728                 SSB_WARN_ON(1);
 729         }
 730 }
 731 #endif /* CONFIG_SSB_BLOCKIO */
 732
 733 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
 734 static const struct ssb_bus_ops ssb_ssb_ops = {
 735         .read8          = ssb_ssb_read8,
 736         .read16         = ssb_ssb_read16,
 737         .read32         = ssb_ssb_read32,
 738         .write8         = ssb_ssb_write8,
 739         .write16        = ssb_ssb_write16,
 740         .write32        = ssb_ssb_write32,
 741 #ifdef CONFIG_SSB_BLOCKIO
 742         .block_read     = ssb_ssb_block_read,
 743         .block_write    = ssb_ssb_block_write,
 744 #endif
 745 };
 746
 747 static int ssb_fetch_invariants(struct ssb_bus *bus,
 748                                 ssb_invariants_func_t get_invariants)
 749 {
 750         struct ssb_init_invariants iv;
 751         int err;
 752
 753         memset(&iv, 0, sizeof(iv));
 754         err = get_invariants(bus, &iv);
 755         if (err)
 756                 goto out;
 757         memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
 758         memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
 759         bus->has_cardbus_slot = iv.has_cardbus_slot;
 760 out:
 761         return err;
 762 }
 763
 764 static int __devinit ssb_bus_register(struct ssb_bus *bus,
 765                                       ssb_invariants_func_t get_invariants,
 766                                       unsigned long baseaddr)
 767 {
 768         int err;
 769
 770         spin_lock_init(&bus->bar_lock);
 771         INIT_LIST_HEAD(&bus->list);
 772 #ifdef CONFIG_SSB_EMBEDDED
 773         spin_lock_init(&bus->gpio_lock);
 774 #endif
 775
 776         /* Powerup the bus */
 777         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
 778         if (err)
 779                 goto out;
 780
 781         /* Init SDIO-host device (if any), before the scan */
 782         err = ssb_sdio_init(bus);
 783         if (err)
 784                 goto err_disable_xtal;
 785
 786         ssb_buses_lock();
 787         bus->busnumber = next_busnumber;
 788         /* Scan for devices (cores) */
 789         err = ssb_bus_scan(bus, baseaddr);
 790         if (err)
 791                 goto err_sdio_exit;
 792
 793         /* Init PCI-host device (if any) */
 794         err = ssb_pci_init(bus);
 795         if (err)
 796                 goto err_unmap;
 797         /* Init PCMCIA-host device (if any) */
 798         err = ssb_pcmcia_init(bus);
 799         if (err)
 800                 goto err_pci_exit;
 801
 802         /* Initialize basic system devices (if available) */
 803         err = ssb_bus_powerup(bus, 0);
 804         if (err)
 805                 goto err_pcmcia_exit;
 806         ssb_chipcommon_init(&bus->chipco);
 807         ssb_extif_init(&bus->extif);
 808         ssb_mipscore_init(&bus->mipscore);
 809         err = ssb_gpio_init(bus);
 810         if (err == -ENOTSUPP)
 811                 ssb_dprintk(KERN_DEBUG PFX "GPIO driver not activated\n");
 812         else if (err)
 813                 ssb_dprintk(KERN_ERR PFX
 814                            "Error registering GPIO driver: %i\n", err);
 815         err = ssb_fetch_invariants(bus, get_invariants);
 816         if (err) {
 817                 ssb_bus_may_powerdown(bus);
 818                 goto err_pcmcia_exit;
 819         }
 820         ssb_bus_may_powerdown(bus);
 821
 822         /* Queue it for attach.
 823          * See the comment at the ssb_is_early_boot definition. */
 824         list_add_tail(&bus->list, &attach_queue);
 825         if (!ssb_is_early_boot) {
 826                 /* This is not early boot, so we must attach the bus now */
 827                 err = ssb_attach_queued_buses();
 828                 if (err)
 829                         goto err_dequeue;
 830         }
 831         next_busnumber++;
 832         ssb_buses_unlock();
 833
 834 out:
 835         return err;
 836
 837 err_dequeue:
 838         list_del(&bus->list);
 839 err_pcmcia_exit:
 840         ssb_pcmcia_exit(bus);
 841 err_pci_exit:
 842         ssb_pci_exit(bus);
 843 err_unmap:
 844         ssb_iounmap(bus);
 845 err_sdio_exit:
 846         ssb_sdio_exit(bus);
 847 err_disable_xtal:
 848         ssb_buses_unlock();
 849         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
 850         return err;
 851 }
 852
 853 #ifdef CONFIG_SSB_PCIHOST
 854 int __devinit ssb_bus_pcibus_register(struct ssb_bus *bus,
 855                                       struct pci_dev *host_pci)
 856 {
 857         int err;
 858
 859         bus->bustype = SSB_BUSTYPE_PCI;
 860         bus->host_pci = host_pci;
 861         bus->ops = &ssb_pci_ops;
 862
 863         err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
 864         if (!err) {
 865                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
 866                            "PCI device %s\n", dev_name(&host_pci->dev));
 867         } else {
 868                 ssb_printk(KERN_ERR PFX "Failed to register PCI version"
 869                            " of SSB with error %d\n", err);
 870         }
 871
 872         return err;
 873 }
 874 EXPORT_SYMBOL(ssb_bus_pcibus_register);
 875 #endif /* CONFIG_SSB_PCIHOST */
 876
 877 #ifdef CONFIG_SSB_PCMCIAHOST
 878 int __devinit ssb_bus_pcmciabus_register(struct ssb_bus *bus,
 879                                          struct pcmcia_device *pcmcia_dev,
 880                                          unsigned long baseaddr)
 881 {
 882         int err;
 883
 884         bus->bustype = SSB_BUSTYPE_PCMCIA;
 885         bus->host_pcmcia = pcmcia_dev;
 886         bus->ops = &ssb_pcmcia_ops;
 887
 888         err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
 889         if (!err) {
 890                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
 891                            "PCMCIA device %s\n", pcmcia_dev->devname);
 892         }
 893
 894         return err;
 895 }
 896 EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
 897 #endif /* CONFIG_SSB_PCMCIAHOST */
 898
 899 #ifdef CONFIG_SSB_SDIOHOST
 900 int __devinit ssb_bus_sdiobus_register(struct ssb_bus *bus,
 901                                        struct sdio_func *func,
 902                                        unsigned int quirks)
 903 {
 904         int err;
 905
 906         bus->bustype = SSB_BUSTYPE_SDIO;
 907         bus->host_sdio = func;
 908         bus->ops = &ssb_sdio_ops;
 909         bus->quirks = quirks;
 910
 911         err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0);
 912         if (!err) {
 913                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
 914                            "SDIO device %s\n", sdio_func_id(func));
 915         }
 916
 917         return err;
 918 }
 919 EXPORT_SYMBOL(ssb_bus_sdiobus_register);
 920 #endif /* CONFIG_SSB_PCMCIAHOST */
 921
 922 int __devinit ssb_bus_ssbbus_register(struct ssb_bus *bus,
 923                                       unsigned long baseaddr,
 924                                       ssb_invariants_func_t get_invariants)
 925 {
 926         int err;
 927
 928         bus->bustype = SSB_BUSTYPE_SSB;
 929         bus->ops = &ssb_ssb_ops;
 930
 931         err = ssb_bus_register(bus, get_invariants, baseaddr);
 932         if (!err) {
 933                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found at "
 934                            "address 0x%08lX\n", baseaddr);
 935         }
 936
 937         return err;
 938 }
 939
 940 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
 941 {
 942         drv->drv.name = drv->name;
 943         drv->drv.bus = &ssb_bustype;
 944         drv->drv.owner = owner;
 945
 946         return driver_register(&drv->drv);
 947 }
 948 EXPORT_SYMBOL(__ssb_driver_register);
 949
 950 void ssb_driver_unregister(struct ssb_driver *drv)
 951 {
 952         driver_unregister(&drv->drv);
 953 }
 954 EXPORT_SYMBOL(ssb_driver_unregister);
 955
 956 void ssb_set_devtypedata(struct ssb_device *dev, void *data)
 957 {
 958         struct ssb_bus *bus = dev->bus;
 959         struct ssb_device *ent;
 960         int i;
 961
 962         for (i = 0; i < bus->nr_devices; i++) {
 963                 ent = &(bus->devices[i]);
 964                 if (ent->id.vendor != dev->id.vendor)
 965                         continue;
 966                 if (ent->id.coreid != dev->id.coreid)
 967                         continue;
 968
 969                 ent->devtypedata = data;
 970         }
 971 }
 972 EXPORT_SYMBOL(ssb_set_devtypedata);
 973
 974 static u32 clkfactor_f6_resolve(u32 v)
 975 {
 976         /* map the magic values */
 977         switch (v) {
 978         case SSB_CHIPCO_CLK_F6_2:
 979                 return 2;
 980         case SSB_CHIPCO_CLK_F6_3:
 981                 return 3;
 982         case SSB_CHIPCO_CLK_F6_4:
 983                 return 4;
 984         case SSB_CHIPCO_CLK_F6_5:
 985                 return 5;
 986         case SSB_CHIPCO_CLK_F6_6:
 987                 return 6;
 988         case SSB_CHIPCO_CLK_F6_7:
 989                 return 7;
 990         }
 991         return 0;
 992 }
 993
 994 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
 995 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
 996 {
 997         u32 n1, n2, clock, m1, m2, m3, mc;
 998
 999         n1 = (n & SSB_CHIPCO_CLK_N1);
1000         n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
1001
1002         switch (plltype) {
1003         case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
1004                 if (m & SSB_CHIPCO_CLK_T6_MMASK)
1005                         return SSB_CHIPCO_CLK_T6_M1;
1006                 return SSB_CHIPCO_CLK_T6_M0;
1007         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1008         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1009         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1010         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1011                 n1 = clkfactor_f6_resolve(n1);
1012                 n2 += SSB_CHIPCO_CLK_F5_BIAS;
1013                 break;
1014         case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
1015                 n1 += SSB_CHIPCO_CLK_T2_BIAS;
1016                 n2 += SSB_CHIPCO_CLK_T2_BIAS;
1017                 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
1018                 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
1019                 break;
1020         case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
1021                 return 100000000;
1022         default:
1023                 SSB_WARN_ON(1);
1024         }
1025
1026         switch (plltype) {
1027         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1028         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1029                 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
1030                 break;
1031         default:
1032                 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
1033         }
1034         if (!clock)
1035                 return 0;
1036
1037         m1 = (m & SSB_CHIPCO_CLK_M1);
1038         m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
1039         m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
1040         mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
1041
1042         switch (plltype) {
1043         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1044         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1045         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1046         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1047                 m1 = clkfactor_f6_resolve(m1);
1048                 if ((plltype == SSB_PLLTYPE_1) ||
1049                     (plltype == SSB_PLLTYPE_3))
1050                         m2 += SSB_CHIPCO_CLK_F5_BIAS;
1051                 else
1052                         m2 = clkfactor_f6_resolve(m2);
1053                 m3 = clkfactor_f6_resolve(m3);
1054
1055                 switch (mc) {
1056                 case SSB_CHIPCO_CLK_MC_BYPASS:
1057                         return clock;
1058                 case SSB_CHIPCO_CLK_MC_M1:
1059                         return (clock / m1);
1060                 case SSB_CHIPCO_CLK_MC_M1M2:
1061                         return (clock / (m1 * m2));
1062                 case SSB_CHIPCO_CLK_MC_M1M2M3:
1063                         return (clock / (m1 * m2 * m3));
1064                 case SSB_CHIPCO_CLK_MC_M1M3:
1065                         return (clock / (m1 * m3));
1066                 }
1067                 return 0;
1068         case SSB_PLLTYPE_2:
1069                 m1 += SSB_CHIPCO_CLK_T2_BIAS;
1070                 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
1071                 m3 += SSB_CHIPCO_CLK_T2_BIAS;
1072                 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
1073                 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
1074                 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
1075
1076                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
1077                         clock /= m1;
1078                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
1079                         clock /= m2;
1080                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
1081                         clock /= m3;
1082                 return clock;
1083         default:
1084                 SSB_WARN_ON(1);
1085         }
1086         return 0;
1087 }
1088
1089 /* Get the current speed the backplane is running at */
1090 u32 ssb_clockspeed(struct ssb_bus *bus)
1091 {
1092         u32 rate;
1093         u32 plltype;
1094         u32 clkctl_n, clkctl_m;
1095
1096         if (bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU)
1097                 return ssb_pmu_get_controlclock(&bus->chipco);
1098
1099         if (ssb_extif_available(&bus->extif))
1100                 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
1101                                            &clkctl_n, &clkctl_m);
1102         else if (bus->chipco.dev)
1103                 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
1104                                             &clkctl_n, &clkctl_m);
1105         else
1106                 return 0;
1107
1108         if (bus->chip_id == 0x5365) {
1109                 rate = 100000000;
1110         } else {
1111                 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
1112                 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
1113                         rate /= 2;
1114         }
1115
1116         return rate;
1117 }
1118 EXPORT_SYMBOL(ssb_clockspeed);
1119
1120 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
1121 {
1122         u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
1123
1124         /* The REJECT bit seems to be different for Backplane rev 2.3 */
1125         switch (rev) {
1126         case SSB_IDLOW_SSBREV_22:
1127         case SSB_IDLOW_SSBREV_24:
1128         case SSB_IDLOW_SSBREV_26:
1129                 return SSB_TMSLOW_REJECT;
1130         case SSB_IDLOW_SSBREV_23:
1131                 return SSB_TMSLOW_REJECT_23;
1132         case SSB_IDLOW_SSBREV_25:     /* TODO - find the proper REJECT bit */
1133         case SSB_IDLOW_SSBREV_27:     /* same here */
1134                 return SSB_TMSLOW_REJECT;       /* this is a guess */
1135         default:
1136                 WARN(1, KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
1137         }
1138         return (SSB_TMSLOW_REJECT | SSB_TMSLOW_REJECT_23);
1139 }
1140
1141 int ssb_device_is_enabled(struct ssb_device *dev)
1142 {
1143         u32 val;
1144         u32 reject;
1145
1146         reject = ssb_tmslow_reject_bitmask(dev);
1147         val = ssb_read32(dev, SSB_TMSLOW);
1148         val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1149
1150         return (val == SSB_TMSLOW_CLOCK);
1151 }
1152 EXPORT_SYMBOL(ssb_device_is_enabled);
1153
1154 static void ssb_flush_tmslow(struct ssb_device *dev)
1155 {
1156         /* Make _really_ sure the device has finished the TMSLOW
1157          * register write transaction, as we risk running into
1158          * a machine check exception otherwise.
1159          * Do this by reading the register back to commit the
1160          * PCI write and delay an additional usec for the device
1161          * to react to the change. */
1162         ssb_read32(dev, SSB_TMSLOW);
1163         udelay(1);
1164 }
1165
1166 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1167 {
1168         u32 val;
1169
1170         ssb_device_disable(dev, core_specific_flags);
1171         ssb_write32(dev, SSB_TMSLOW,
1172                     SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1173                     SSB_TMSLOW_FGC | core_specific_flags);
1174         ssb_flush_tmslow(dev);
1175
1176         /* Clear SERR if set. This is a hw bug workaround. */
1177         if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1178                 ssb_write32(dev, SSB_TMSHIGH, 0);
1179
1180         val = ssb_read32(dev, SSB_IMSTATE);
1181         if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1182                 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1183                 ssb_write32(dev, SSB_IMSTATE, val);
1184         }
1185
1186         ssb_write32(dev, SSB_TMSLOW,
1187                     SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1188                     core_specific_flags);
1189         ssb_flush_tmslow(dev);
1190
1191         ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1192                     core_specific_flags);
1193         ssb_flush_tmslow(dev);
1194 }
1195 EXPORT_SYMBOL(ssb_device_enable);
1196
1197 /* Wait for bitmask in a register to get set or cleared.
1198  * timeout is in units of ten-microseconds */
1199 static int ssb_wait_bits(struct ssb_device *dev, u16 reg, u32 bitmask,
1200                          int timeout, int set)
1201 {
1202         int i;
1203         u32 val;
1204
1205         for (i = 0; i < timeout; i++) {
1206                 val = ssb_read32(dev, reg);
1207                 if (set) {
1208                         if ((val & bitmask) == bitmask)
1209                                 return 0;
1210                 } else {
1211                         if (!(val & bitmask))
1212                                 return 0;
1213                 }
1214                 udelay(10);
1215         }
1216         printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1217                             "register %04X to %s.\n",
1218                bitmask, reg, (set ? "set" : "clear"));
1219
1220         return -ETIMEDOUT;
1221 }
1222
1223 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1224 {
1225         u32 reject, val;
1226
1227         if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1228                 return;
1229
1230         reject = ssb_tmslow_reject_bitmask(dev);
1231
1232         if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_CLOCK) {
1233                 ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1234                 ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1);
1235                 ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
1236
1237                 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1238                         val = ssb_read32(dev, SSB_IMSTATE);
1239                         val |= SSB_IMSTATE_REJECT;
1240                         ssb_write32(dev, SSB_IMSTATE, val);
1241                         ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000,
1242                                       0);
1243                 }
1244
1245                 ssb_write32(dev, SSB_TMSLOW,
1246                         SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1247                         reject | SSB_TMSLOW_RESET |
1248                         core_specific_flags);
1249                 ssb_flush_tmslow(dev);
1250
1251                 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1252                         val = ssb_read32(dev, SSB_IMSTATE);
1253                         val &= ~SSB_IMSTATE_REJECT;
1254                         ssb_write32(dev, SSB_IMSTATE, val);
1255                 }
1256         }
1257
1258         ssb_write32(dev, SSB_TMSLOW,
1259                     reject | SSB_TMSLOW_RESET |
1260                     core_specific_flags);
1261         ssb_flush_tmslow(dev);
1262 }
1263 EXPORT_SYMBOL(ssb_device_disable);
1264
1265 /* Some chipsets need routing known for PCIe and 64-bit DMA */
1266 static bool ssb_dma_translation_special_bit(struct ssb_device *dev)
1267 {
1268         u16 chip_id = dev->bus->chip_id;
1269
1270         if (dev->id.coreid == SSB_DEV_80211) {
1271                 return (chip_id == 0x4322 || chip_id == 43221 ||
1272                         chip_id == 43231 || chip_id == 43222);
1273         }
1274
1275         return 0;
1276 }
1277
1278 u32 ssb_dma_translation(struct ssb_device *dev)
1279 {
1280         switch (dev->bus->bustype) {
1281         case SSB_BUSTYPE_SSB:
1282                 return 0;
1283         case SSB_BUSTYPE_PCI:
1284                 if (pci_is_pcie(dev->bus->host_pci) &&
1285                     ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_DMA64) {
1286                         return SSB_PCIE_DMA_H32;
1287                 } else {
1288                         if (ssb_dma_translation_special_bit(dev))
1289                                 return SSB_PCIE_DMA_H32;
1290                         else
1291                                 return SSB_PCI_DMA;
1292                 }
1293         default:
1294                 __ssb_dma_not_implemented(dev);
1295         }
1296         return 0;
1297 }
1298 EXPORT_SYMBOL(ssb_dma_translation);
1299
1300 int ssb_bus_may_powerdown(struct ssb_bus *bus)
1301 {
1302         struct ssb_chipcommon *cc;
1303         int err = 0;
1304
1305         /* On buses where more than one core may be working
1306          * at a time, we must not powerdown stuff if there are
1307          * still cores that may want to run. */
1308         if (bus->bustype == SSB_BUSTYPE_SSB)
1309                 goto out;
1310
1311         cc = &bus->chipco;
1312
1313         if (!cc->dev)
1314                 goto out;
1315         if (cc->dev->id.revision < 5)
1316                 goto out;
1317
1318         ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1319         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1320         if (err)
1321                 goto error;
1322 out:
1323 #ifdef CONFIG_SSB_DEBUG
1324         bus->powered_up = 0;
1325 #endif
1326         return err;
1327 error:
1328         ssb_printk(KERN_ERR PFX "Bus powerdown failed\n");
1329         goto out;
1330 }
1331 EXPORT_SYMBOL(ssb_bus_may_powerdown);
1332
1333 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1334 {
1335         int err;
1336         enum ssb_clkmode mode;
1337
1338         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1339         if (err)
1340                 goto error;
1341
1342 #ifdef CONFIG_SSB_DEBUG
1343         bus->powered_up = 1;
1344 #endif
1345
1346         mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1347         ssb_chipco_set_clockmode(&bus->chipco, mode);
1348
1349         return 0;
1350 error:
1351         ssb_printk(KERN_ERR PFX "Bus powerup failed\n");
1352         return err;
1353 }
1354 EXPORT_SYMBOL(ssb_bus_powerup);
1355
1356 static void ssb_broadcast_value(struct ssb_device *dev,
1357                                 u32 address, u32 data)
1358 {
1359 #ifdef CONFIG_SSB_DRIVER_PCICORE
1360         /* This is used for both, PCI and ChipCommon core, so be careful. */
1361         BUILD_BUG_ON(SSB_PCICORE_BCAST_ADDR != SSB_CHIPCO_BCAST_ADDR);
1362         BUILD_BUG_ON(SSB_PCICORE_BCAST_DATA != SSB_CHIPCO_BCAST_DATA);
1363 #endif
1364
1365         ssb_write32(dev, SSB_CHIPCO_BCAST_ADDR, address);
1366         ssb_read32(dev, SSB_CHIPCO_BCAST_ADDR); /* flush */
1367         ssb_write32(dev, SSB_CHIPCO_BCAST_DATA, data);
1368         ssb_read32(dev, SSB_CHIPCO_BCAST_DATA); /* flush */
1369 }
1370
1371 void ssb_commit_settings(struct ssb_bus *bus)
1372 {
1373         struct ssb_device *dev;
1374
1375 #ifdef CONFIG_SSB_DRIVER_PCICORE
1376         dev = bus->chipco.dev ? bus->chipco.dev : bus->pcicore.dev;
1377 #else
1378         dev = bus->chipco.dev;
1379 #endif
1380         if (WARN_ON(!dev))
1381                 return;
1382         /* This forces an update of the cached registers. */
1383         ssb_broadcast_value(dev, 0xFD8, 0);
1384 }
1385 EXPORT_SYMBOL(ssb_commit_settings);
1386
1387 u32 ssb_admatch_base(u32 adm)
1388 {
1389         u32 base = 0;
1390
1391         switch (adm & SSB_ADM_TYPE) {
1392         case SSB_ADM_TYPE0:
1393                 base = (adm & SSB_ADM_BASE0);
1394                 break;
1395         case SSB_ADM_TYPE1:
1396                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1397                 base = (adm & SSB_ADM_BASE1);
1398                 break;
1399         case SSB_ADM_TYPE2:
1400                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1401                 base = (adm & SSB_ADM_BASE2);
1402                 break;
1403         default:
1404                 SSB_WARN_ON(1);
1405         }
1406
1407         return base;
1408 }
1409 EXPORT_SYMBOL(ssb_admatch_base);
1410
1411 u32 ssb_admatch_size(u32 adm)
1412 {
1413         u32 size = 0;
1414
1415         switch (adm & SSB_ADM_TYPE) {
1416         case SSB_ADM_TYPE0:
1417                 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1418                 break;
1419         case SSB_ADM_TYPE1:
1420                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1421                 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1422                 break;
1423         case SSB_ADM_TYPE2:
1424                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1425                 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1426                 break;
1427         default:
1428                 SSB_WARN_ON(1);
1429         }
1430         size = (1 << (size + 1));
1431
1432         return size;
1433 }
1434 EXPORT_SYMBOL(ssb_admatch_size);
1435
1436 static int __init ssb_modinit(void)
1437 {
1438         int err;
1439
1440         /* See the comment at the ssb_is_early_boot definition */
1441         ssb_is_early_boot = 0;
1442         err = bus_register(&ssb_bustype);
1443         if (err)
1444                 return err;
1445
1446         /* Maybe we already registered some buses at early boot.
1447          * Check for this and attach them
1448          */
1449         ssb_buses_lock();
1450         err = ssb_attach_queued_buses();
1451         ssb_buses_unlock();
1452         if (err) {
1453                 bus_unregister(&ssb_bustype);
1454                 goto out;
1455         }
1456
1457         err = b43_pci_ssb_bridge_init();
1458         if (err) {
1459                 ssb_printk(KERN_ERR "Broadcom 43xx PCI-SSB-bridge "
1460                            "initialization failed\n");
1461                 /* don't fail SSB init because of this */
1462                 err = 0;
1463         }
1464         err = ssb_gige_init();
1465         if (err) {
1466                 ssb_printk(KERN_ERR "SSB Broadcom Gigabit Ethernet "
1467                            "driver initialization failed\n");
1468                 /* don't fail SSB init because of this */
1469                 err = 0;
1470         }
1471 out:
1472         return err;
1473 }
1474 /* ssb must be initialized after PCI but before the ssb drivers.
1475  * That means we must use some initcall between subsys_initcall
1476  * and device_initcall. */
1477 fs_initcall(ssb_modinit);
1478
1479 static void __exit ssb_modexit(void)
1480 {
1481         ssb_gige_exit();
1482         b43_pci_ssb_bridge_exit();
1483         bus_unregister(&ssb_bustype);
1484 }
1485 module_exit(ssb_modexit)