drivers/ssb/main.c

   1 /*
   2  * Sonics Silicon Backplane
   3  * Subsystem core
   4  *
   5  * Copyright 2005, Broadcom Corporation
   6  * Copyright 2006, 2007, Michael Buesch <[email protected]>
   7  *
   8  * Licensed under the GNU/GPL. See COPYING for details.
   9  */
  10
  11 #include "ssb_private.h"
  12
  13 #include <linux/delay.h>
  14 #include <linux/io.h>
  15 #include <linux/ssb/ssb.h>
  16 #include <linux/ssb/ssb_regs.h>
  17 #include <linux/ssb/ssb_driver_gige.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/pci.h>
  20 #include <linux/mmc/sdio_func.h>
  21
  22 #include <pcmcia/cs_types.h>
  23 #include <pcmcia/cs.h>
  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 int ssb_devices_freeze(struct ssb_bus *bus)
 214 {
 215         struct ssb_device *dev;
 216         struct ssb_driver *drv;
 217         int err = 0;
 218         int i;
 219         pm_message_t state = PMSG_FREEZE;
 220
 221         /* First check that we are capable to freeze all devices. */
 222         for (i = 0; i < bus->nr_devices; i++) {
 223                 dev = &(bus->devices[i]);
 224                 if (!dev->dev ||
 225                     !dev->dev->driver ||
 226                     !device_is_registered(dev->dev))
 227                         continue;
 228                 drv = drv_to_ssb_drv(dev->dev->driver);
 229                 if (!drv)
 230                         continue;
 231                 if (!drv->suspend) {
 232                         /* Nope, can't suspend this one. */
 233                         return -EOPNOTSUPP;
 234                 }
 235         }
 236         /* Now suspend all devices */
 237         for (i = 0; i < bus->nr_devices; i++) {
 238                 dev = &(bus->devices[i]);
 239                 if (!dev->dev ||
 240                     !dev->dev->driver ||
 241                     !device_is_registered(dev->dev))
 242                         continue;
 243                 drv = drv_to_ssb_drv(dev->dev->driver);
 244                 if (!drv)
 245                         continue;
 246                 err = drv->suspend(dev, state);
 247                 if (err) {
 248                         ssb_printk(KERN_ERR PFX "Failed to freeze device %s\n",
 249                                    dev_name(dev->dev));
 250                         goto err_unwind;
 251                 }
 252         }
 253
 254         return 0;
 255 err_unwind:
 256         for (i--; i >= 0; i--) {
 257                 dev = &(bus->devices[i]);
 258                 if (!dev->dev ||
 259                     !dev->dev->driver ||
 260                     !device_is_registered(dev->dev))
 261                         continue;
 262                 drv = drv_to_ssb_drv(dev->dev->driver);
 263                 if (!drv)
 264                         continue;
 265                 if (drv->resume)
 266                         drv->resume(dev);
 267         }
 268         return err;
 269 }
 270
 271 int ssb_devices_thaw(struct ssb_bus *bus)
 272 {
 273         struct ssb_device *dev;
 274         struct ssb_driver *drv;
 275         int err;
 276         int i;
 277
 278         for (i = 0; i < bus->nr_devices; i++) {
 279                 dev = &(bus->devices[i]);
 280                 if (!dev->dev ||
 281                     !dev->dev->driver ||
 282                     !device_is_registered(dev->dev))
 283                         continue;
 284                 drv = drv_to_ssb_drv(dev->dev->driver);
 285                 if (!drv)
 286                         continue;
 287                 if (SSB_WARN_ON(!drv->resume))
 288                         continue;
 289                 err = drv->resume(dev);
 290                 if (err) {
 291                         ssb_printk(KERN_ERR PFX "Failed to thaw device %s\n",
 292                                    dev_name(dev->dev));
 293                 }
 294         }
 295
 296         return 0;
 297 }
 298 #endif /* CONFIG_SSB_SPROM */
 299
 300 static void ssb_device_shutdown(struct device *dev)
 301 {
 302         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 303         struct ssb_driver *ssb_drv;
 304
 305         if (!dev->driver)
 306                 return;
 307         ssb_drv = drv_to_ssb_drv(dev->driver);
 308         if (ssb_drv && ssb_drv->shutdown)
 309                 ssb_drv->shutdown(ssb_dev);
 310 }
 311
 312 static int ssb_device_remove(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
 317         if (ssb_drv && ssb_drv->remove)
 318                 ssb_drv->remove(ssb_dev);
 319         ssb_device_put(ssb_dev);
 320
 321         return 0;
 322 }
 323
 324 static int ssb_device_probe(struct device *dev)
 325 {
 326         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 327         struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
 328         int err = 0;
 329
 330         ssb_device_get(ssb_dev);
 331         if (ssb_drv && ssb_drv->probe)
 332                 err = ssb_drv->probe(ssb_dev, &ssb_dev->id);
 333         if (err)
 334                 ssb_device_put(ssb_dev);
 335
 336         return err;
 337 }
 338
 339 static int ssb_match_devid(const struct ssb_device_id *tabid,
 340                            const struct ssb_device_id *devid)
 341 {
 342         if ((tabid->vendor != devid->vendor) &&
 343             tabid->vendor != SSB_ANY_VENDOR)
 344                 return 0;
 345         if ((tabid->coreid != devid->coreid) &&
 346             tabid->coreid != SSB_ANY_ID)
 347                 return 0;
 348         if ((tabid->revision != devid->revision) &&
 349             tabid->revision != SSB_ANY_REV)
 350                 return 0;
 351         return 1;
 352 }
 353
 354 static int ssb_bus_match(struct device *dev, struct device_driver *drv)
 355 {
 356         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 357         struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv);
 358         const struct ssb_device_id *id;
 359
 360         for (id = ssb_drv->id_table;
 361              id->vendor || id->coreid || id->revision;
 362              id++) {
 363                 if (ssb_match_devid(id, &ssb_dev->id))
 364                         return 1; /* found */
 365         }
 366
 367         return 0;
 368 }
 369
 370 static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 371 {
 372         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 373
 374         if (!dev)
 375                 return -ENODEV;
 376
 377         return add_uevent_var(env,
 378                              "MODALIAS=ssb:v%04Xid%04Xrev%02X",
 379                              ssb_dev->id.vendor, ssb_dev->id.coreid,
 380                              ssb_dev->id.revision);
 381 }
 382
 383 static struct bus_type ssb_bustype = {
 384         .name           = "ssb",
 385         .match          = ssb_bus_match,
 386         .probe          = ssb_device_probe,
 387         .remove         = ssb_device_remove,
 388         .shutdown       = ssb_device_shutdown,
 389         .suspend        = ssb_device_suspend,
 390         .resume         = ssb_device_resume,
 391         .uevent         = ssb_device_uevent,
 392 };
 393
 394 static void ssb_buses_lock(void)
 395 {
 396         /* See the comment at the ssb_is_early_boot definition */
 397         if (!ssb_is_early_boot)
 398                 mutex_lock(&buses_mutex);
 399 }
 400
 401 static void ssb_buses_unlock(void)
 402 {
 403         /* See the comment at the ssb_is_early_boot definition */
 404         if (!ssb_is_early_boot)
 405                 mutex_unlock(&buses_mutex);
 406 }
 407
 408 static void ssb_devices_unregister(struct ssb_bus *bus)
 409 {
 410         struct ssb_device *sdev;
 411         int i;
 412
 413         for (i = bus->nr_devices - 1; i >= 0; i--) {
 414                 sdev = &(bus->devices[i]);
 415                 if (sdev->dev)
 416                         device_unregister(sdev->dev);
 417         }
 418 }
 419
 420 void ssb_bus_unregister(struct ssb_bus *bus)
 421 {
 422         ssb_buses_lock();
 423         ssb_devices_unregister(bus);
 424         list_del(&bus->list);
 425         ssb_buses_unlock();
 426
 427         ssb_pcmcia_exit(bus);
 428         ssb_pci_exit(bus);
 429         ssb_iounmap(bus);
 430 }
 431 EXPORT_SYMBOL(ssb_bus_unregister);
 432
 433 static void ssb_release_dev(struct device *dev)
 434 {
 435         struct __ssb_dev_wrapper *devwrap;
 436
 437         devwrap = container_of(dev, struct __ssb_dev_wrapper, dev);
 438         kfree(devwrap);
 439 }
 440
 441 static int ssb_devices_register(struct ssb_bus *bus)
 442 {
 443         struct ssb_device *sdev;
 444         struct device *dev;
 445         struct __ssb_dev_wrapper *devwrap;
 446         int i, err = 0;
 447         int dev_idx = 0;
 448
 449         for (i = 0; i < bus->nr_devices; i++) {
 450                 sdev = &(bus->devices[i]);
 451
 452                 /* We don't register SSB-system devices to the kernel,
 453                  * as the drivers for them are built into SSB. */
 454                 switch (sdev->id.coreid) {
 455                 case SSB_DEV_CHIPCOMMON:
 456                 case SSB_DEV_PCI:
 457                 case SSB_DEV_PCIE:
 458                 case SSB_DEV_PCMCIA:
 459                 case SSB_DEV_MIPS:
 460                 case SSB_DEV_MIPS_3302:
 461                 case SSB_DEV_EXTIF:
 462                         continue;
 463                 }
 464
 465                 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL);
 466                 if (!devwrap) {
 467                         ssb_printk(KERN_ERR PFX
 468                                    "Could not allocate device\n");
 469                         err = -ENOMEM;
 470                         goto error;
 471                 }
 472                 dev = &devwrap->dev;
 473                 devwrap->sdev = sdev;
 474
 475                 dev->release = ssb_release_dev;
 476                 dev->bus = &ssb_bustype;
 477                 dev_set_name(dev, "ssb%u:%d", bus->busnumber, dev_idx);
 478
 479                 switch (bus->bustype) {
 480                 case SSB_BUSTYPE_PCI:
 481 #ifdef CONFIG_SSB_PCIHOST
 482                         sdev->irq = bus->host_pci->irq;
 483                         dev->parent = &bus->host_pci->dev;
 484 #endif
 485                         break;
 486                 case SSB_BUSTYPE_PCMCIA:
 487 #ifdef CONFIG_SSB_PCMCIAHOST
 488                         sdev->irq = bus->host_pcmcia->irq.AssignedIRQ;
 489                         dev->parent = &bus->host_pcmcia->dev;
 490 #endif
 491                         break;
 492                 case SSB_BUSTYPE_SDIO:
 493 #ifdef CONFIG_SSB_SDIO
 494                         sdev->irq = bus->host_sdio->dev.irq;
 495                         dev->parent = &bus->host_sdio->dev;
 496 #endif
 497                         break;
 498                 case SSB_BUSTYPE_SSB:
 499                         dev->dma_mask = &dev->coherent_dma_mask;
 500                         break;
 501                 }
 502
 503                 sdev->dev = dev;
 504                 err = device_register(dev);
 505                 if (err) {
 506                         ssb_printk(KERN_ERR PFX
 507                                    "Could not register %s\n",
 508                                    dev_name(dev));
 509                         /* Set dev to NULL to not unregister
 510                          * dev on error unwinding. */
 511                         sdev->dev = NULL;
 512                         kfree(devwrap);
 513                         goto error;
 514                 }
 515                 dev_idx++;
 516         }
 517
 518         return 0;
 519 error:
 520         /* Unwind the already registered devices. */
 521         ssb_devices_unregister(bus);
 522         return err;
 523 }
 524
 525 /* Needs ssb_buses_lock() */
 526 static int ssb_attach_queued_buses(void)
 527 {
 528         struct ssb_bus *bus, *n;
 529         int err = 0;
 530         int drop_them_all = 0;
 531
 532         list_for_each_entry_safe(bus, n, &attach_queue, list) {
 533                 if (drop_them_all) {
 534                         list_del(&bus->list);
 535                         continue;
 536                 }
 537                 /* Can't init the PCIcore in ssb_bus_register(), as that
 538                  * is too early in boot for embedded systems
 539                  * (no udelay() available). So do it here in attach stage.
 540                  */
 541                 err = ssb_bus_powerup(bus, 0);
 542                 if (err)
 543                         goto error;
 544                 ssb_pcicore_init(&bus->pcicore);
 545                 ssb_bus_may_powerdown(bus);
 546
 547                 err = ssb_devices_register(bus);
 548 error:
 549                 if (err) {
 550                         drop_them_all = 1;
 551                         list_del(&bus->list);
 552                         continue;
 553                 }
 554                 list_move_tail(&bus->list, &buses);
 555         }
 556
 557         return err;
 558 }
 559
 560 static u8 ssb_ssb_read8(struct ssb_device *dev, u16 offset)
 561 {
 562         struct ssb_bus *bus = dev->bus;
 563
 564         offset += dev->core_index * SSB_CORE_SIZE;
 565         return readb(bus->mmio + offset);
 566 }
 567
 568 static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset)
 569 {
 570         struct ssb_bus *bus = dev->bus;
 571
 572         offset += dev->core_index * SSB_CORE_SIZE;
 573         return readw(bus->mmio + offset);
 574 }
 575
 576 static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
 577 {
 578         struct ssb_bus *bus = dev->bus;
 579
 580         offset += dev->core_index * SSB_CORE_SIZE;
 581         return readl(bus->mmio + offset);
 582 }
 583
 584 #ifdef CONFIG_SSB_BLOCKIO
 585 static void ssb_ssb_block_read(struct ssb_device *dev, void *buffer,
 586                                size_t count, u16 offset, u8 reg_width)
 587 {
 588         struct ssb_bus *bus = dev->bus;
 589         void __iomem *addr;
 590
 591         offset += dev->core_index * SSB_CORE_SIZE;
 592         addr = bus->mmio + offset;
 593
 594         switch (reg_width) {
 595         case sizeof(u8): {
 596                 u8 *buf = buffer;
 597
 598                 while (count) {
 599                         *buf = __raw_readb(addr);
 600                         buf++;
 601                         count--;
 602                 }
 603                 break;
 604         }
 605         case sizeof(u16): {
 606                 __le16 *buf = buffer;
 607
 608                 SSB_WARN_ON(count & 1);
 609                 while (count) {
 610                         *buf = (__force __le16)__raw_readw(addr);
 611                         buf++;
 612                         count -= 2;
 613                 }
 614                 break;
 615         }
 616         case sizeof(u32): {
 617                 __le32 *buf = buffer;
 618
 619                 SSB_WARN_ON(count & 3);
 620                 while (count) {
 621                         *buf = (__force __le32)__raw_readl(addr);
 622                         buf++;
 623                         count -= 4;
 624                 }
 625                 break;
 626         }
 627         default:
 628                 SSB_WARN_ON(1);
 629         }
 630 }
 631 #endif /* CONFIG_SSB_BLOCKIO */
 632
 633 static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
 634 {
 635         struct ssb_bus *bus = dev->bus;
 636
 637         offset += dev->core_index * SSB_CORE_SIZE;
 638         writeb(value, bus->mmio + offset);
 639 }
 640
 641 static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
 642 {
 643         struct ssb_bus *bus = dev->bus;
 644
 645         offset += dev->core_index * SSB_CORE_SIZE;
 646         writew(value, bus->mmio + offset);
 647 }
 648
 649 static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
 650 {
 651         struct ssb_bus *bus = dev->bus;
 652
 653         offset += dev->core_index * SSB_CORE_SIZE;
 654         writel(value, bus->mmio + offset);
 655 }
 656
 657 #ifdef CONFIG_SSB_BLOCKIO
 658 static void ssb_ssb_block_write(struct ssb_device *dev, const void *buffer,
 659                                 size_t count, u16 offset, u8 reg_width)
 660 {
 661         struct ssb_bus *bus = dev->bus;
 662         void __iomem *addr;
 663
 664         offset += dev->core_index * SSB_CORE_SIZE;
 665         addr = bus->mmio + offset;
 666
 667         switch (reg_width) {
 668         case sizeof(u8): {
 669                 const u8 *buf = buffer;
 670
 671                 while (count) {
 672                         __raw_writeb(*buf, addr);
 673                         buf++;
 674                         count--;
 675                 }
 676                 break;
 677         }
 678         case sizeof(u16): {
 679                 const __le16 *buf = buffer;
 680
 681                 SSB_WARN_ON(count & 1);
 682                 while (count) {
 683                         __raw_writew((__force u16)(*buf), addr);
 684                         buf++;
 685                         count -= 2;
 686                 }
 687                 break;
 688         }
 689         case sizeof(u32): {
 690                 const __le32 *buf = buffer;
 691
 692                 SSB_WARN_ON(count & 3);
 693                 while (count) {
 694                         __raw_writel((__force u32)(*buf), addr);
 695                         buf++;
 696                         count -= 4;
 697                 }
 698                 break;
 699         }
 700         default:
 701                 SSB_WARN_ON(1);
 702         }
 703 }
 704 #endif /* CONFIG_SSB_BLOCKIO */
 705
 706 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
 707 static const struct ssb_bus_ops ssb_ssb_ops = {
 708         .read8          = ssb_ssb_read8,
 709         .read16         = ssb_ssb_read16,
 710         .read32         = ssb_ssb_read32,
 711         .write8         = ssb_ssb_write8,
 712         .write16        = ssb_ssb_write16,
 713         .write32        = ssb_ssb_write32,
 714 #ifdef CONFIG_SSB_BLOCKIO
 715         .block_read     = ssb_ssb_block_read,
 716         .block_write    = ssb_ssb_block_write,
 717 #endif
 718 };
 719
 720 static int ssb_fetch_invariants(struct ssb_bus *bus,
 721                                 ssb_invariants_func_t get_invariants)
 722 {
 723         struct ssb_init_invariants iv;
 724         int err;
 725
 726         memset(&iv, 0, sizeof(iv));
 727         err = get_invariants(bus, &iv);
 728         if (err)
 729                 goto out;
 730         memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
 731         memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
 732         bus->has_cardbus_slot = iv.has_cardbus_slot;
 733 out:
 734         return err;
 735 }
 736
 737 static int ssb_bus_register(struct ssb_bus *bus,
 738                             ssb_invariants_func_t get_invariants,
 739                             unsigned long baseaddr)
 740 {
 741         int err;
 742
 743         spin_lock_init(&bus->bar_lock);
 744         INIT_LIST_HEAD(&bus->list);
 745 #ifdef CONFIG_SSB_EMBEDDED
 746         spin_lock_init(&bus->gpio_lock);
 747 #endif
 748
 749         /* Powerup the bus */
 750         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
 751         if (err)
 752                 goto out;
 753
 754         /* Init SDIO-host device (if any), before the scan */
 755         err = ssb_sdio_init(bus);
 756         if (err)
 757                 goto err_disable_xtal;
 758
 759         ssb_buses_lock();
 760         bus->busnumber = next_busnumber;
 761         /* Scan for devices (cores) */
 762         err = ssb_bus_scan(bus, baseaddr);
 763         if (err)
 764                 goto err_sdio_exit;
 765
 766         /* Init PCI-host device (if any) */
 767         err = ssb_pci_init(bus);
 768         if (err)
 769                 goto err_unmap;
 770         /* Init PCMCIA-host device (if any) */
 771         err = ssb_pcmcia_init(bus);
 772         if (err)
 773                 goto err_pci_exit;
 774
 775         /* Initialize basic system devices (if available) */
 776         err = ssb_bus_powerup(bus, 0);
 777         if (err)
 778                 goto err_pcmcia_exit;
 779         ssb_chipcommon_init(&bus->chipco);
 780         ssb_mipscore_init(&bus->mipscore);
 781         err = ssb_fetch_invariants(bus, get_invariants);
 782         if (err) {
 783                 ssb_bus_may_powerdown(bus);
 784                 goto err_pcmcia_exit;
 785         }
 786         ssb_bus_may_powerdown(bus);
 787
 788         /* Queue it for attach.
 789          * See the comment at the ssb_is_early_boot definition. */
 790         list_add_tail(&bus->list, &attach_queue);
 791         if (!ssb_is_early_boot) {
 792                 /* This is not early boot, so we must attach the bus now */
 793                 err = ssb_attach_queued_buses();
 794                 if (err)
 795                         goto err_dequeue;
 796         }
 797         next_busnumber++;
 798         ssb_buses_unlock();
 799
 800 out:
 801         return err;
 802
 803 err_dequeue:
 804         list_del(&bus->list);
 805 err_pcmcia_exit:
 806         ssb_pcmcia_exit(bus);
 807 err_pci_exit:
 808         ssb_pci_exit(bus);
 809 err_unmap:
 810         ssb_iounmap(bus);
 811 err_sdio_exit:
 812         ssb_sdio_exit(bus);
 813 err_disable_xtal:
 814         ssb_buses_unlock();
 815         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
 816         return err;
 817 }
 818
 819 #ifdef CONFIG_SSB_PCIHOST
 820 int ssb_bus_pcibus_register(struct ssb_bus *bus,
 821                             struct pci_dev *host_pci)
 822 {
 823         int err;
 824
 825         bus->bustype = SSB_BUSTYPE_PCI;
 826         bus->host_pci = host_pci;
 827         bus->ops = &ssb_pci_ops;
 828
 829         err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
 830         if (!err) {
 831                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
 832                            "PCI device %s\n", dev_name(&host_pci->dev));
 833         }
 834
 835         return err;
 836 }
 837 EXPORT_SYMBOL(ssb_bus_pcibus_register);
 838 #endif /* CONFIG_SSB_PCIHOST */
 839
 840 #ifdef CONFIG_SSB_PCMCIAHOST
 841 int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
 842                                struct pcmcia_device *pcmcia_dev,
 843                                unsigned long baseaddr)
 844 {
 845         int err;
 846
 847         bus->bustype = SSB_BUSTYPE_PCMCIA;
 848         bus->host_pcmcia = pcmcia_dev;
 849         bus->ops = &ssb_pcmcia_ops;
 850
 851         err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
 852         if (!err) {
 853                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
 854                            "PCMCIA device %s\n", pcmcia_dev->devname);
 855         }
 856
 857         return err;
 858 }
 859 EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
 860 #endif /* CONFIG_SSB_PCMCIAHOST */
 861
 862 #ifdef CONFIG_SSB_SDIOHOST
 863 int ssb_bus_sdiobus_register(struct ssb_bus *bus, struct sdio_func *func,
 864                              unsigned int quirks)
 865 {
 866         int err;
 867
 868         bus->bustype = SSB_BUSTYPE_SDIO;
 869         bus->host_sdio = func;
 870         bus->ops = &ssb_sdio_ops;
 871         bus->quirks = quirks;
 872
 873         err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0);
 874         if (!err) {
 875                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
 876                            "SDIO device %s\n", sdio_func_id(func));
 877         }
 878
 879         return err;
 880 }
 881 EXPORT_SYMBOL(ssb_bus_sdiobus_register);
 882 #endif /* CONFIG_SSB_PCMCIAHOST */
 883
 884 int ssb_bus_ssbbus_register(struct ssb_bus *bus,
 885                             unsigned long baseaddr,
 886                             ssb_invariants_func_t get_invariants)
 887 {
 888         int err;
 889
 890         bus->bustype = SSB_BUSTYPE_SSB;
 891         bus->ops = &ssb_ssb_ops;
 892
 893         err = ssb_bus_register(bus, get_invariants, baseaddr);
 894         if (!err) {
 895                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found at "
 896                            "address 0x%08lX\n", baseaddr);
 897         }
 898
 899         return err;
 900 }
 901
 902 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
 903 {
 904         drv->drv.name = drv->name;
 905         drv->drv.bus = &ssb_bustype;
 906         drv->drv.owner = owner;
 907
 908         return driver_register(&drv->drv);
 909 }
 910 EXPORT_SYMBOL(__ssb_driver_register);
 911
 912 void ssb_driver_unregister(struct ssb_driver *drv)
 913 {
 914         driver_unregister(&drv->drv);
 915 }
 916 EXPORT_SYMBOL(ssb_driver_unregister);
 917
 918 void ssb_set_devtypedata(struct ssb_device *dev, void *data)
 919 {
 920         struct ssb_bus *bus = dev->bus;
 921         struct ssb_device *ent;
 922         int i;
 923
 924         for (i = 0; i < bus->nr_devices; i++) {
 925                 ent = &(bus->devices[i]);
 926                 if (ent->id.vendor != dev->id.vendor)
 927                         continue;
 928                 if (ent->id.coreid != dev->id.coreid)
 929                         continue;
 930
 931                 ent->devtypedata = data;
 932         }
 933 }
 934 EXPORT_SYMBOL(ssb_set_devtypedata);
 935
 936 static u32 clkfactor_f6_resolve(u32 v)
 937 {
 938         /* map the magic values */
 939         switch (v) {
 940         case SSB_CHIPCO_CLK_F6_2:
 941                 return 2;
 942         case SSB_CHIPCO_CLK_F6_3:
 943                 return 3;
 944         case SSB_CHIPCO_CLK_F6_4:
 945                 return 4;
 946         case SSB_CHIPCO_CLK_F6_5:
 947                 return 5;
 948         case SSB_CHIPCO_CLK_F6_6:
 949                 return 6;
 950         case SSB_CHIPCO_CLK_F6_7:
 951                 return 7;
 952         }
 953         return 0;
 954 }
 955
 956 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
 957 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
 958 {
 959         u32 n1, n2, clock, m1, m2, m3, mc;
 960
 961         n1 = (n & SSB_CHIPCO_CLK_N1);
 962         n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
 963
 964         switch (plltype) {
 965         case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
 966                 if (m & SSB_CHIPCO_CLK_T6_MMASK)
 967                         return SSB_CHIPCO_CLK_T6_M0;
 968                 return SSB_CHIPCO_CLK_T6_M1;
 969         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
 970         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
 971         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
 972         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
 973                 n1 = clkfactor_f6_resolve(n1);
 974                 n2 += SSB_CHIPCO_CLK_F5_BIAS;
 975                 break;
 976         case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
 977                 n1 += SSB_CHIPCO_CLK_T2_BIAS;
 978                 n2 += SSB_CHIPCO_CLK_T2_BIAS;
 979                 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
 980                 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
 981                 break;
 982         case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
 983                 return 100000000;
 984         default:
 985                 SSB_WARN_ON(1);
 986         }
 987
 988         switch (plltype) {
 989         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
 990         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
 991                 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
 992                 break;
 993         default:
 994                 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
 995         }
 996         if (!clock)
 997                 return 0;
 998
 999         m1 = (m & SSB_CHIPCO_CLK_M1);
1000         m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
1001         m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
1002         mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
1003
1004         switch (plltype) {
1005         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1006         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1007         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1008         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1009                 m1 = clkfactor_f6_resolve(m1);
1010                 if ((plltype == SSB_PLLTYPE_1) ||
1011                     (plltype == SSB_PLLTYPE_3))
1012                         m2 += SSB_CHIPCO_CLK_F5_BIAS;
1013                 else
1014                         m2 = clkfactor_f6_resolve(m2);
1015                 m3 = clkfactor_f6_resolve(m3);
1016
1017                 switch (mc) {
1018                 case SSB_CHIPCO_CLK_MC_BYPASS:
1019                         return clock;
1020                 case SSB_CHIPCO_CLK_MC_M1:
1021                         return (clock / m1);
1022                 case SSB_CHIPCO_CLK_MC_M1M2:
1023                         return (clock / (m1 * m2));
1024                 case SSB_CHIPCO_CLK_MC_M1M2M3:
1025                         return (clock / (m1 * m2 * m3));
1026                 case SSB_CHIPCO_CLK_MC_M1M3:
1027                         return (clock / (m1 * m3));
1028                 }
1029                 return 0;
1030         case SSB_PLLTYPE_2:
1031                 m1 += SSB_CHIPCO_CLK_T2_BIAS;
1032                 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
1033                 m3 += SSB_CHIPCO_CLK_T2_BIAS;
1034                 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
1035                 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
1036                 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
1037
1038                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
1039                         clock /= m1;
1040                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
1041                         clock /= m2;
1042                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
1043                         clock /= m3;
1044                 return clock;
1045         default:
1046                 SSB_WARN_ON(1);
1047         }
1048         return 0;
1049 }
1050
1051 /* Get the current speed the backplane is running at */
1052 u32 ssb_clockspeed(struct ssb_bus *bus)
1053 {
1054         u32 rate;
1055         u32 plltype;
1056         u32 clkctl_n, clkctl_m;
1057
1058         if (ssb_extif_available(&bus->extif))
1059                 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
1060                                            &clkctl_n, &clkctl_m);
1061         else if (bus->chipco.dev)
1062                 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
1063                                             &clkctl_n, &clkctl_m);
1064         else
1065                 return 0;
1066
1067         if (bus->chip_id == 0x5365) {
1068                 rate = 100000000;
1069         } else {
1070                 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
1071                 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
1072                         rate /= 2;
1073         }
1074
1075         return rate;
1076 }
1077 EXPORT_SYMBOL(ssb_clockspeed);
1078
1079 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
1080 {
1081         u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
1082
1083         /* The REJECT bit changed position in TMSLOW between
1084          * Backplane revisions. */
1085         switch (rev) {
1086         case SSB_IDLOW_SSBREV_22:
1087                 return SSB_TMSLOW_REJECT_22;
1088         case SSB_IDLOW_SSBREV_23:
1089                 return SSB_TMSLOW_REJECT_23;
1090         case SSB_IDLOW_SSBREV_24:     /* TODO - find the proper REJECT bits */
1091         case SSB_IDLOW_SSBREV_25:     /* same here */
1092         case SSB_IDLOW_SSBREV_26:     /* same here */
1093         case SSB_IDLOW_SSBREV_27:     /* same here */
1094                 return SSB_TMSLOW_REJECT_23;    /* this is a guess */
1095         default:
1096                 printk(KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
1097                 WARN_ON(1);
1098         }
1099         return (SSB_TMSLOW_REJECT_22 | SSB_TMSLOW_REJECT_23);
1100 }
1101
1102 int ssb_device_is_enabled(struct ssb_device *dev)
1103 {
1104         u32 val;
1105         u32 reject;
1106
1107         reject = ssb_tmslow_reject_bitmask(dev);
1108         val = ssb_read32(dev, SSB_TMSLOW);
1109         val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1110
1111         return (val == SSB_TMSLOW_CLOCK);
1112 }
1113 EXPORT_SYMBOL(ssb_device_is_enabled);
1114
1115 static void ssb_flush_tmslow(struct ssb_device *dev)
1116 {
1117         /* Make _really_ sure the device has finished the TMSLOW
1118          * register write transaction, as we risk running into
1119          * a machine check exception otherwise.
1120          * Do this by reading the register back to commit the
1121          * PCI write and delay an additional usec for the device
1122          * to react to the change. */
1123         ssb_read32(dev, SSB_TMSLOW);
1124         udelay(1);
1125 }
1126
1127 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1128 {
1129         u32 val;
1130
1131         ssb_device_disable(dev, core_specific_flags);
1132         ssb_write32(dev, SSB_TMSLOW,
1133                     SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1134                     SSB_TMSLOW_FGC | core_specific_flags);
1135         ssb_flush_tmslow(dev);
1136
1137         /* Clear SERR if set. This is a hw bug workaround. */
1138         if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1139                 ssb_write32(dev, SSB_TMSHIGH, 0);
1140
1141         val = ssb_read32(dev, SSB_IMSTATE);
1142         if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1143                 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1144                 ssb_write32(dev, SSB_IMSTATE, val);
1145         }
1146
1147         ssb_write32(dev, SSB_TMSLOW,
1148                     SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1149                     core_specific_flags);
1150         ssb_flush_tmslow(dev);
1151
1152         ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1153                     core_specific_flags);
1154         ssb_flush_tmslow(dev);
1155 }
1156 EXPORT_SYMBOL(ssb_device_enable);
1157
1158 /* Wait for a bit in a register to get set or unset.
1159  * timeout is in units of ten-microseconds */
1160 static int ssb_wait_bit(struct ssb_device *dev, u16 reg, u32 bitmask,
1161                         int timeout, int set)
1162 {
1163         int i;
1164         u32 val;
1165
1166         for (i = 0; i < timeout; i++) {
1167                 val = ssb_read32(dev, reg);
1168                 if (set) {
1169                         if (val & bitmask)
1170                                 return 0;
1171                 } else {
1172                         if (!(val & bitmask))
1173                                 return 0;
1174                 }
1175                 udelay(10);
1176         }
1177         printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1178                             "register %04X to %s.\n",
1179                bitmask, reg, (set ? "set" : "clear"));
1180
1181         return -ETIMEDOUT;
1182 }
1183
1184 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1185 {
1186         u32 reject;
1187
1188         if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1189                 return;
1190
1191         reject = ssb_tmslow_reject_bitmask(dev);
1192         ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1193         ssb_wait_bit(dev, SSB_TMSLOW, reject, 1000, 1);
1194         ssb_wait_bit(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
1195         ssb_write32(dev, SSB_TMSLOW,
1196                     SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1197                     reject | SSB_TMSLOW_RESET |
1198                     core_specific_flags);
1199         ssb_flush_tmslow(dev);
1200
1201         ssb_write32(dev, SSB_TMSLOW,
1202                     reject | SSB_TMSLOW_RESET |
1203                     core_specific_flags);
1204         ssb_flush_tmslow(dev);
1205 }
1206 EXPORT_SYMBOL(ssb_device_disable);
1207
1208 u32 ssb_dma_translation(struct ssb_device *dev)
1209 {
1210         switch (dev->bus->bustype) {
1211         case SSB_BUSTYPE_SSB:
1212                 return 0;
1213         case SSB_BUSTYPE_PCI:
1214                 return SSB_PCI_DMA;
1215         default:
1216                 __ssb_dma_not_implemented(dev);
1217         }
1218         return 0;
1219 }
1220 EXPORT_SYMBOL(ssb_dma_translation);
1221
1222 int ssb_dma_set_mask(struct ssb_device *dev, u64 mask)
1223 {
1224 #ifdef CONFIG_SSB_PCIHOST
1225         int err;
1226 #endif
1227
1228         switch (dev->bus->bustype) {
1229         case SSB_BUSTYPE_PCI:
1230 #ifdef CONFIG_SSB_PCIHOST
1231                 err = pci_set_dma_mask(dev->bus->host_pci, mask);
1232                 if (err)
1233                         return err;
1234                 err = pci_set_consistent_dma_mask(dev->bus->host_pci, mask);
1235                 return err;
1236 #endif
1237         case SSB_BUSTYPE_SSB:
1238                 return dma_set_mask(dev->dev, mask);
1239         default:
1240                 __ssb_dma_not_implemented(dev);
1241         }
1242         return -ENOSYS;
1243 }
1244 EXPORT_SYMBOL(ssb_dma_set_mask);
1245
1246 void * ssb_dma_alloc_consistent(struct ssb_device *dev, size_t size,
1247                                 dma_addr_t *dma_handle, gfp_t gfp_flags)
1248 {
1249         switch (dev->bus->bustype) {
1250         case SSB_BUSTYPE_PCI:
1251 #ifdef CONFIG_SSB_PCIHOST
1252                 if (gfp_flags & GFP_DMA) {
1253                         /* Workaround: The PCI API does not support passing
1254                          * a GFP flag. */
1255                         return dma_alloc_coherent(&dev->bus->host_pci->dev,
1256                                                   size, dma_handle, gfp_flags);
1257                 }
1258                 return pci_alloc_consistent(dev->bus->host_pci, size, dma_handle);
1259 #endif
1260         case SSB_BUSTYPE_SSB:
1261                 return dma_alloc_coherent(dev->dev, size, dma_handle, gfp_flags);
1262         default:
1263                 __ssb_dma_not_implemented(dev);
1264         }
1265         return NULL;
1266 }
1267 EXPORT_SYMBOL(ssb_dma_alloc_consistent);
1268
1269 void ssb_dma_free_consistent(struct ssb_device *dev, size_t size,
1270                              void *vaddr, dma_addr_t dma_handle,
1271                              gfp_t gfp_flags)
1272 {
1273         switch (dev->bus->bustype) {
1274         case SSB_BUSTYPE_PCI:
1275 #ifdef CONFIG_SSB_PCIHOST
1276                 if (gfp_flags & GFP_DMA) {
1277                         /* Workaround: The PCI API does not support passing
1278                          * a GFP flag. */
1279                         dma_free_coherent(&dev->bus->host_pci->dev,
1280                                           size, vaddr, dma_handle);
1281                         return;
1282                 }
1283                 pci_free_consistent(dev->bus->host_pci, size,
1284                                     vaddr, dma_handle);
1285                 return;
1286 #endif
1287         case SSB_BUSTYPE_SSB:
1288                 dma_free_coherent(dev->dev, size, vaddr, dma_handle);
1289                 return;
1290         default:
1291                 __ssb_dma_not_implemented(dev);
1292         }
1293 }
1294 EXPORT_SYMBOL(ssb_dma_free_consistent);
1295
1296 int ssb_bus_may_powerdown(struct ssb_bus *bus)
1297 {
1298         struct ssb_chipcommon *cc;
1299         int err = 0;
1300
1301         /* On buses where more than one core may be working
1302          * at a time, we must not powerdown stuff if there are
1303          * still cores that may want to run. */
1304         if (bus->bustype == SSB_BUSTYPE_SSB)
1305                 goto out;
1306
1307         cc = &bus->chipco;
1308
1309         if (!cc->dev)
1310                 goto out;
1311         if (cc->dev->id.revision < 5)
1312                 goto out;
1313
1314         ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1315         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1316         if (err)
1317                 goto error;
1318 out:
1319 #ifdef CONFIG_SSB_DEBUG
1320         bus->powered_up = 0;
1321 #endif
1322         return err;
1323 error:
1324         ssb_printk(KERN_ERR PFX "Bus powerdown failed\n");
1325         goto out;
1326 }
1327 EXPORT_SYMBOL(ssb_bus_may_powerdown);
1328
1329 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1330 {
1331         struct ssb_chipcommon *cc;
1332         int err;
1333         enum ssb_clkmode mode;
1334
1335         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1336         if (err)
1337                 goto error;
1338         cc = &bus->chipco;
1339         mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1340         ssb_chipco_set_clockmode(cc, mode);
1341
1342 #ifdef CONFIG_SSB_DEBUG
1343         bus->powered_up = 1;
1344 #endif
1345         return 0;
1346 error:
1347         ssb_printk(KERN_ERR PFX "Bus powerup failed\n");
1348         return err;
1349 }
1350 EXPORT_SYMBOL(ssb_bus_powerup);
1351
1352 u32 ssb_admatch_base(u32 adm)
1353 {
1354         u32 base = 0;
1355
1356         switch (adm & SSB_ADM_TYPE) {
1357         case SSB_ADM_TYPE0:
1358                 base = (adm & SSB_ADM_BASE0);
1359                 break;
1360         case SSB_ADM_TYPE1:
1361                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1362                 base = (adm & SSB_ADM_BASE1);
1363                 break;
1364         case SSB_ADM_TYPE2:
1365                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1366                 base = (adm & SSB_ADM_BASE2);
1367                 break;
1368         default:
1369                 SSB_WARN_ON(1);
1370         }
1371
1372         return base;
1373 }
1374 EXPORT_SYMBOL(ssb_admatch_base);
1375
1376 u32 ssb_admatch_size(u32 adm)
1377 {
1378         u32 size = 0;
1379
1380         switch (adm & SSB_ADM_TYPE) {
1381         case SSB_ADM_TYPE0:
1382                 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1383                 break;
1384         case SSB_ADM_TYPE1:
1385                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1386                 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1387                 break;
1388         case SSB_ADM_TYPE2:
1389                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1390                 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1391                 break;
1392         default:
1393                 SSB_WARN_ON(1);
1394         }
1395         size = (1 << (size + 1));
1396
1397         return size;
1398 }
1399 EXPORT_SYMBOL(ssb_admatch_size);
1400
1401 static int __init ssb_modinit(void)
1402 {
1403         int err;
1404
1405         /* See the comment at the ssb_is_early_boot definition */
1406         ssb_is_early_boot = 0;
1407         err = bus_register(&ssb_bustype);
1408         if (err)
1409                 return err;
1410
1411         /* Maybe we already registered some buses at early boot.
1412          * Check for this and attach them
1413          */
1414         ssb_buses_lock();
1415         err = ssb_attach_queued_buses();
1416         ssb_buses_unlock();
1417         if (err) {
1418                 bus_unregister(&ssb_bustype);
1419                 goto out;
1420         }
1421
1422         err = b43_pci_ssb_bridge_init();
1423         if (err) {
1424                 ssb_printk(KERN_ERR "Broadcom 43xx PCI-SSB-bridge "
1425                            "initialization failed\n");
1426                 /* don't fail SSB init because of this */
1427                 err = 0;
1428         }
1429         err = ssb_gige_init();
1430         if (err) {
1431                 ssb_printk(KERN_ERR "SSB Broadcom Gigabit Ethernet "
1432                            "driver initialization failed\n");
1433                 /* don't fail SSB init because of this */
1434                 err = 0;
1435         }
1436 out:
1437         return err;
1438 }
1439 /* ssb must be initialized after PCI but before the ssb drivers.
1440  * That means we must use some initcall between subsys_initcall
1441  * and device_initcall. */
1442 fs_initcall(ssb_modinit);
1443
1444 static void __exit ssb_modexit(void)
1445 {
1446         ssb_gige_exit();
1447         b43_pci_ssb_bridge_exit();
1448         bus_unregister(&ssb_bustype);
1449 }
1450 module_exit(ssb_modexit)