drivers/bcma/main.c

   1 /*
   2  * Broadcom specific AMBA
   3  * Bus subsystem
   4  *
   5  * Licensed under the GNU/GPL. See COPYING for details.
   6  */
   7
   8 #include "bcma_private.h"
   9 #include <linux/module.h>
  10 #include <linux/mmc/sdio_func.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/pci.h>
  13 #include <linux/bcma/bcma.h>
  14 #include <linux/slab.h>
  15 #include <linux/of_address.h>
  16 #include <linux/of_irq.h>
  17 #include <linux/of_platform.h>
  18
  19 MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
  20 MODULE_LICENSE("GPL");
  21
  22 /* contains the number the next bus should get. */
  23 static unsigned int bcma_bus_next_num = 0;
  24
  25 /* bcma_buses_mutex locks the bcma_bus_next_num */
  26 static DEFINE_MUTEX(bcma_buses_mutex);
  27
  28 static int bcma_bus_match(struct device *dev, struct device_driver *drv);
  29 static int bcma_device_probe(struct device *dev);
  30 static int bcma_device_remove(struct device *dev);
  31 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);
  32
  33 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
  34 {
  35         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
  36         return sprintf(buf, "0x%03X\n", core->id.manuf);
  37 }
  38 static DEVICE_ATTR_RO(manuf);
  39
  40 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
  41 {
  42         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
  43         return sprintf(buf, "0x%03X\n", core->id.id);
  44 }
  45 static DEVICE_ATTR_RO(id);
  46
  47 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
  48 {
  49         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
  50         return sprintf(buf, "0x%02X\n", core->id.rev);
  51 }
  52 static DEVICE_ATTR_RO(rev);
  53
  54 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
  55 {
  56         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
  57         return sprintf(buf, "0x%X\n", core->id.class);
  58 }
  59 static DEVICE_ATTR_RO(class);
  60
  61 static struct attribute *bcma_device_attrs[] = {
  62         &dev_attr_manuf.attr,
  63         &dev_attr_id.attr,
  64         &dev_attr_rev.attr,
  65         &dev_attr_class.attr,
  66         NULL,
  67 };
  68 ATTRIBUTE_GROUPS(bcma_device);
  69
  70 static struct bus_type bcma_bus_type = {
  71         .name           = "bcma",
  72         .match          = bcma_bus_match,
  73         .probe          = bcma_device_probe,
  74         .remove         = bcma_device_remove,
  75         .uevent         = bcma_device_uevent,
  76         .dev_groups     = bcma_device_groups,
  77 };
  78
  79 static u16 bcma_cc_core_id(struct bcma_bus *bus)
  80 {
  81         if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
  82                 return BCMA_CORE_4706_CHIPCOMMON;
  83         return BCMA_CORE_CHIPCOMMON;
  84 }
  85
  86 struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid,
  87                                         u8 unit)
  88 {
  89         struct bcma_device *core;
  90
  91         list_for_each_entry(core, &bus->cores, list) {
  92                 if (core->id.id == coreid && core->core_unit == unit)
  93                         return core;
  94         }
  95         return NULL;
  96 }
  97 EXPORT_SYMBOL_GPL(bcma_find_core_unit);
  98
  99 bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
 100                      int timeout)
 101 {
 102         unsigned long deadline = jiffies + timeout;
 103         u32 val;
 104
 105         do {
 106                 val = bcma_read32(core, reg);
 107                 if ((val & mask) == value)
 108                         return true;
 109                 cpu_relax();
 110                 udelay(10);
 111         } while (!time_after_eq(jiffies, deadline));
 112
 113         bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
 114
 115         return false;
 116 }
 117
 118 static void bcma_release_core_dev(struct device *dev)
 119 {
 120         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 121         if (core->io_addr)
 122                 iounmap(core->io_addr);
 123         if (core->io_wrap)
 124                 iounmap(core->io_wrap);
 125         kfree(core);
 126 }
 127
 128 static bool bcma_is_core_needed_early(u16 core_id)
 129 {
 130         switch (core_id) {
 131         case BCMA_CORE_NS_NAND:
 132         case BCMA_CORE_NS_QSPI:
 133                 return true;
 134         }
 135
 136         return false;
 137 }
 138
 139 static struct device_node *bcma_of_find_child_device(struct platform_device *parent,
 140                                                      struct bcma_device *core)
 141 {
 142         struct device_node *node;
 143         u64 size;
 144         const __be32 *reg;
 145
 146         if (!parent || !parent->dev.of_node)
 147                 return NULL;
 148
 149         for_each_child_of_node(parent->dev.of_node, node) {
 150                 reg = of_get_address(node, 0, &size, NULL);
 151                 if (!reg)
 152                         continue;
 153                 if (of_translate_address(node, reg) == core->addr)
 154                         return node;
 155         }
 156         return NULL;
 157 }
 158
 159 static int bcma_of_irq_parse(struct platform_device *parent,
 160                              struct bcma_device *core,
 161                              struct of_phandle_args *out_irq, int num)
 162 {
 163         __be32 laddr[1];
 164         int rc;
 165
 166         if (core->dev.of_node) {
 167                 rc = of_irq_parse_one(core->dev.of_node, num, out_irq);
 168                 if (!rc)
 169                         return rc;
 170         }
 171
 172         out_irq->np = parent->dev.of_node;
 173         out_irq->args_count = 1;
 174         out_irq->args[0] = num;
 175
 176         laddr[0] = cpu_to_be32(core->addr);
 177         return of_irq_parse_raw(laddr, out_irq);
 178 }
 179
 180 static unsigned int bcma_of_get_irq(struct platform_device *parent,
 181                                     struct bcma_device *core, int num)
 182 {
 183         struct of_phandle_args out_irq;
 184         int ret;
 185
 186         if (!IS_ENABLED(CONFIG_OF_IRQ) || !parent || !parent->dev.of_node)
 187                 return 0;
 188
 189         ret = bcma_of_irq_parse(parent, core, &out_irq, num);
 190         if (ret) {
 191                 bcma_debug(core->bus, "bcma_of_get_irq() failed with rc=%d\n",
 192                            ret);
 193                 return 0;
 194         }
 195
 196         return irq_create_of_mapping(&out_irq);
 197 }
 198
 199 static void bcma_of_fill_device(struct platform_device *parent,
 200                                 struct bcma_device *core)
 201 {
 202         struct device_node *node;
 203
 204         if (!IS_ENABLED(CONFIG_OF_IRQ))
 205                 return;
 206
 207         node = bcma_of_find_child_device(parent, core);
 208         if (node)
 209                 core->dev.of_node = node;
 210
 211         core->irq = bcma_of_get_irq(parent, core, 0);
 212
 213         of_dma_configure(&core->dev, node);
 214 }
 215
 216 unsigned int bcma_core_irq(struct bcma_device *core, int num)
 217 {
 218         struct bcma_bus *bus = core->bus;
 219         unsigned int mips_irq;
 220
 221         switch (bus->hosttype) {
 222         case BCMA_HOSTTYPE_PCI:
 223                 return bus->host_pci->irq;
 224         case BCMA_HOSTTYPE_SOC:
 225                 if (bus->drv_mips.core && num == 0) {
 226                         mips_irq = bcma_core_mips_irq(core);
 227                         return mips_irq <= 4 ? mips_irq + 2 : 0;
 228                 }
 229                 if (bus->host_pdev)
 230                         return bcma_of_get_irq(bus->host_pdev, core, num);
 231                 return 0;
 232         case BCMA_HOSTTYPE_SDIO:
 233                 return 0;
 234         }
 235
 236         return 0;
 237 }
 238 EXPORT_SYMBOL(bcma_core_irq);
 239
 240 void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core)
 241 {
 242         core->dev.release = bcma_release_core_dev;
 243         core->dev.bus = &bcma_bus_type;
 244         dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
 245
 246         switch (bus->hosttype) {
 247         case BCMA_HOSTTYPE_PCI:
 248                 core->dev.parent = &bus->host_pci->dev;
 249                 core->dma_dev = &bus->host_pci->dev;
 250                 core->irq = bus->host_pci->irq;
 251                 break;
 252         case BCMA_HOSTTYPE_SOC:
 253                 if (IS_ENABLED(CONFIG_OF) && bus->host_pdev) {
 254                         core->dma_dev = &bus->host_pdev->dev;
 255                         core->dev.parent = &bus->host_pdev->dev;
 256                         bcma_of_fill_device(bus->host_pdev, core);
 257                 } else {
 258                         core->dev.dma_mask = &core->dev.coherent_dma_mask;
 259                         core->dma_dev = &core->dev;
 260                 }
 261                 break;
 262         case BCMA_HOSTTYPE_SDIO:
 263                 break;
 264         }
 265 }
 266
 267 struct device *bcma_bus_get_host_dev(struct bcma_bus *bus)
 268 {
 269         switch (bus->hosttype) {
 270         case BCMA_HOSTTYPE_PCI:
 271                 if (bus->host_pci)
 272                         return &bus->host_pci->dev;
 273                 else
 274                         return NULL;
 275         case BCMA_HOSTTYPE_SOC:
 276                 if (bus->host_pdev)
 277                         return &bus->host_pdev->dev;
 278                 else
 279                         return NULL;
 280         case BCMA_HOSTTYPE_SDIO:
 281                 if (bus->host_sdio)
 282                         return &bus->host_sdio->dev;
 283                 else
 284                         return NULL;
 285         }
 286         return NULL;
 287 }
 288
 289 void bcma_init_bus(struct bcma_bus *bus)
 290 {
 291         mutex_lock(&bcma_buses_mutex);
 292         bus->num = bcma_bus_next_num++;
 293         mutex_unlock(&bcma_buses_mutex);
 294
 295         INIT_LIST_HEAD(&bus->cores);
 296         bus->nr_cores = 0;
 297
 298         bcma_detect_chip(bus);
 299 }
 300
 301 static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
 302 {
 303         int err;
 304
 305         err = device_register(&core->dev);
 306         if (err) {
 307                 bcma_err(bus, "Could not register dev for core 0x%03X\n",
 308                          core->id.id);
 309                 put_device(&core->dev);
 310                 return;
 311         }
 312         core->dev_registered = true;
 313 }
 314
 315 static int bcma_register_devices(struct bcma_bus *bus)
 316 {
 317         struct bcma_device *core;
 318         int err;
 319
 320         list_for_each_entry(core, &bus->cores, list) {
 321                 /* We support that cores ourself */
 322                 switch (core->id.id) {
 323                 case BCMA_CORE_4706_CHIPCOMMON:
 324                 case BCMA_CORE_CHIPCOMMON:
 325                 case BCMA_CORE_NS_CHIPCOMMON_B:
 326                 case BCMA_CORE_PCI:
 327                 case BCMA_CORE_PCIE:
 328                 case BCMA_CORE_PCIE2:
 329                 case BCMA_CORE_MIPS_74K:
 330                 case BCMA_CORE_4706_MAC_GBIT_COMMON:
 331                         continue;
 332                 }
 333
 334                 /* Early cores were already registered */
 335                 if (bcma_is_core_needed_early(core->id.id))
 336                         continue;
 337
 338                 /* Only first GMAC core on BCM4706 is connected and working */
 339                 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
 340                     core->core_unit > 0)
 341                         continue;
 342
 343                 bcma_register_core(bus, core);
 344         }
 345
 346 #ifdef CONFIG_BCMA_PFLASH
 347         if (bus->drv_cc.pflash.present) {
 348                 err = platform_device_register(&bcma_pflash_dev);
 349                 if (err)
 350                         bcma_err(bus, "Error registering parallel flash\n");
 351         }
 352 #endif
 353
 354 #ifdef CONFIG_BCMA_SFLASH
 355         if (bus->drv_cc.sflash.present) {
 356                 err = platform_device_register(&bcma_sflash_dev);
 357                 if (err)
 358                         bcma_err(bus, "Error registering serial flash\n");
 359         }
 360 #endif
 361
 362 #ifdef CONFIG_BCMA_NFLASH
 363         if (bus->drv_cc.nflash.present) {
 364                 err = platform_device_register(&bcma_nflash_dev);
 365                 if (err)
 366                         bcma_err(bus, "Error registering NAND flash\n");
 367         }
 368 #endif
 369         err = bcma_gpio_init(&bus->drv_cc);
 370         if (err == -ENOTSUPP)
 371                 bcma_debug(bus, "GPIO driver not activated\n");
 372         else if (err)
 373                 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
 374
 375         if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
 376                 err = bcma_chipco_watchdog_register(&bus->drv_cc);
 377                 if (err)
 378                         bcma_err(bus, "Error registering watchdog driver\n");
 379         }
 380
 381         return 0;
 382 }
 383
 384 void bcma_unregister_cores(struct bcma_bus *bus)
 385 {
 386         struct bcma_device *core, *tmp;
 387
 388         list_for_each_entry_safe(core, tmp, &bus->cores, list) {
 389                 if (!core->dev_registered)
 390                         continue;
 391                 list_del(&core->list);
 392                 device_unregister(&core->dev);
 393         }
 394         if (bus->hosttype == BCMA_HOSTTYPE_SOC)
 395                 platform_device_unregister(bus->drv_cc.watchdog);
 396
 397         /* Now noone uses internally-handled cores, we can free them */
 398         list_for_each_entry_safe(core, tmp, &bus->cores, list) {
 399                 list_del(&core->list);
 400                 kfree(core);
 401         }
 402 }
 403
 404 int bcma_bus_register(struct bcma_bus *bus)
 405 {
 406         int err;
 407         struct bcma_device *core;
 408         struct device *dev;
 409
 410         /* Scan for devices (cores) */
 411         err = bcma_bus_scan(bus);
 412         if (err) {
 413                 bcma_err(bus, "Failed to scan: %d\n", err);
 414                 return err;
 415         }
 416
 417         /* Early init CC core */
 418         core = bcma_find_core(bus, bcma_cc_core_id(bus));
 419         if (core) {
 420                 bus->drv_cc.core = core;
 421                 bcma_core_chipcommon_early_init(&bus->drv_cc);
 422         }
 423
 424         /* Early init PCIE core */
 425         core = bcma_find_core(bus, BCMA_CORE_PCIE);
 426         if (core) {
 427                 bus->drv_pci[0].core = core;
 428                 bcma_core_pci_early_init(&bus->drv_pci[0]);
 429         }
 430
 431         dev = bcma_bus_get_host_dev(bus);
 432         if (dev) {
 433                 of_platform_default_populate(dev->of_node, NULL, dev);
 434         }
 435
 436         /* Cores providing flash access go before SPROM init */
 437         list_for_each_entry(core, &bus->cores, list) {
 438                 if (bcma_is_core_needed_early(core->id.id))
 439                         bcma_register_core(bus, core);
 440         }
 441
 442         /* Try to get SPROM */
 443         err = bcma_sprom_get(bus);
 444         if (err == -ENOENT) {
 445                 bcma_err(bus, "No SPROM available\n");
 446         } else if (err)
 447                 bcma_err(bus, "Failed to get SPROM: %d\n", err);
 448
 449         /* Init CC core */
 450         core = bcma_find_core(bus, bcma_cc_core_id(bus));
 451         if (core) {
 452                 bus->drv_cc.core = core;
 453                 bcma_core_chipcommon_init(&bus->drv_cc);
 454         }
 455
 456         /* Init CC core */
 457         core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
 458         if (core) {
 459                 bus->drv_cc_b.core = core;
 460                 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
 461         }
 462
 463         /* Init MIPS core */
 464         core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
 465         if (core) {
 466                 bus->drv_mips.core = core;
 467                 bcma_core_mips_init(&bus->drv_mips);
 468         }
 469
 470         /* Init PCIE core */
 471         core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
 472         if (core) {
 473                 bus->drv_pci[0].core = core;
 474                 bcma_core_pci_init(&bus->drv_pci[0]);
 475         }
 476
 477         /* Init PCIE core */
 478         core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
 479         if (core) {
 480                 bus->drv_pci[1].core = core;
 481                 bcma_core_pci_init(&bus->drv_pci[1]);
 482         }
 483
 484         /* Init PCIe Gen 2 core */
 485         core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
 486         if (core) {
 487                 bus->drv_pcie2.core = core;
 488                 bcma_core_pcie2_init(&bus->drv_pcie2);
 489         }
 490
 491         /* Init GBIT MAC COMMON core */
 492         core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
 493         if (core) {
 494                 bus->drv_gmac_cmn.core = core;
 495                 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
 496         }
 497
 498         /* Register found cores */
 499         bcma_register_devices(bus);
 500
 501         bcma_info(bus, "Bus registered\n");
 502
 503         return 0;
 504 }
 505
 506 void bcma_bus_unregister(struct bcma_bus *bus)
 507 {
 508         int err;
 509
 510         err = bcma_gpio_unregister(&bus->drv_cc);
 511         if (err == -EBUSY)
 512                 bcma_err(bus, "Some GPIOs are still in use.\n");
 513         else if (err)
 514                 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
 515
 516         bcma_core_chipcommon_b_free(&bus->drv_cc_b);
 517
 518         bcma_unregister_cores(bus);
 519 }
 520
 521 /*
 522  * This is a special version of bus registration function designed for SoCs.
 523  * It scans bus and performs basic initialization of main cores only.
 524  * Please note it requires memory allocation, however it won't try to sleep.
 525  */
 526 int __init bcma_bus_early_register(struct bcma_bus *bus)
 527 {
 528         int err;
 529         struct bcma_device *core;
 530
 531         /* Scan for devices (cores) */
 532         err = bcma_bus_scan(bus);
 533         if (err) {
 534                 bcma_err(bus, "Failed to scan bus: %d\n", err);
 535                 return -1;
 536         }
 537
 538         /* Early init CC core */
 539         core = bcma_find_core(bus, bcma_cc_core_id(bus));
 540         if (core) {
 541                 bus->drv_cc.core = core;
 542                 bcma_core_chipcommon_early_init(&bus->drv_cc);
 543         }
 544
 545         /* Early init MIPS core */
 546         core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
 547         if (core) {
 548                 bus->drv_mips.core = core;
 549                 bcma_core_mips_early_init(&bus->drv_mips);
 550         }
 551
 552         bcma_info(bus, "Early bus registered\n");
 553
 554         return 0;
 555 }
 556
 557 #ifdef CONFIG_PM
 558 int bcma_bus_suspend(struct bcma_bus *bus)
 559 {
 560         struct bcma_device *core;
 561
 562         list_for_each_entry(core, &bus->cores, list) {
 563                 struct device_driver *drv = core->dev.driver;
 564                 if (drv) {
 565                         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 566                         if (adrv->suspend)
 567                                 adrv->suspend(core);
 568                 }
 569         }
 570         return 0;
 571 }
 572
 573 int bcma_bus_resume(struct bcma_bus *bus)
 574 {
 575         struct bcma_device *core;
 576
 577         /* Init CC core */
 578         if (bus->drv_cc.core) {
 579                 bus->drv_cc.setup_done = false;
 580                 bcma_core_chipcommon_init(&bus->drv_cc);
 581         }
 582
 583         list_for_each_entry(core, &bus->cores, list) {
 584                 struct device_driver *drv = core->dev.driver;
 585                 if (drv) {
 586                         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 587                         if (adrv->resume)
 588                                 adrv->resume(core);
 589                 }
 590         }
 591
 592         return 0;
 593 }
 594 #endif
 595
 596 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
 597 {
 598         drv->drv.name = drv->name;
 599         drv->drv.bus = &bcma_bus_type;
 600         drv->drv.owner = owner;
 601
 602         return driver_register(&drv->drv);
 603 }
 604 EXPORT_SYMBOL_GPL(__bcma_driver_register);
 605
 606 void bcma_driver_unregister(struct bcma_driver *drv)
 607 {
 608         driver_unregister(&drv->drv);
 609 }
 610 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
 611
 612 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
 613 {
 614         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 615         struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 616         const struct bcma_device_id *cid = &core->id;
 617         const struct bcma_device_id *did;
 618
 619         for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
 620             if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
 621                 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
 622                 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
 623                 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
 624                         return 1;
 625         }
 626         return 0;
 627 }
 628
 629 static int bcma_device_probe(struct device *dev)
 630 {
 631         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 632         struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 633                                                drv);
 634         int err = 0;
 635
 636         if (adrv->probe)
 637                 err = adrv->probe(core);
 638
 639         return err;
 640 }
 641
 642 static int bcma_device_remove(struct device *dev)
 643 {
 644         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 645         struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 646                                                drv);
 647
 648         if (adrv->remove)
 649                 adrv->remove(core);
 650
 651         return 0;
 652 }
 653
 654 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 655 {
 656         struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 657
 658         return add_uevent_var(env,
 659                               "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
 660                               core->id.manuf, core->id.id,
 661                               core->id.rev, core->id.class);
 662 }
 663
 664 static unsigned int bcma_bus_registered;
 665
 666 /*
 667  * If built-in, bus has to be registered early, before any driver calls
 668  * bcma_driver_register.
 669  * Otherwise registering driver would trigger BUG in driver_register.
 670  */
 671 static int __init bcma_init_bus_register(void)
 672 {
 673         int err;
 674
 675         if (bcma_bus_registered)
 676                 return 0;
 677
 678         err = bus_register(&bcma_bus_type);
 679         if (!err)
 680                 bcma_bus_registered = 1;
 681
 682         return err;
 683 }
 684 #ifndef MODULE
 685 fs_initcall(bcma_init_bus_register);
 686 #endif
 687
 688 /* Main initialization has to be done with SPI/mtd/NAND/SPROM available */
 689 static int __init bcma_modinit(void)
 690 {
 691         int err;
 692
 693         err = bcma_init_bus_register();
 694         if (err)
 695                 return err;
 696
 697         err = bcma_host_soc_register_driver();
 698         if (err) {
 699                 pr_err("SoC host initialization failed\n");
 700                 err = 0;
 701         }
 702 #ifdef CONFIG_BCMA_HOST_PCI
 703         err = bcma_host_pci_init();
 704         if (err) {
 705                 pr_err("PCI host initialization failed\n");
 706                 err = 0;
 707         }
 708 #endif
 709
 710         return err;
 711 }
 712 module_init(bcma_modinit);
 713
 714 static void __exit bcma_modexit(void)
 715 {
 716 #ifdef CONFIG_BCMA_HOST_PCI
 717         bcma_host_pci_exit();
 718 #endif
 719         bcma_host_soc_unregister_driver();
 720         bus_unregister(&bcma_bus_type);
 721 }
 722 module_exit(bcma_modexit)