1 /* 2 * Sonics Silicon Backplane 3 * Subsystem core 4 * 5 * Copyright 2005, Broadcom Corporation 6 * Copyright 2006, 2007, Michael Buesch <m@bues.ch> 7 * 8 * Licensed under the GNU/GPL. See COPYING for details. 9 */ 10 11 #include "ssb_private.h" 12 13 #include <linux/delay.h> 14 #include <linux/io.h> 15 #include <linux/module.h> 16 #include <linux/platform_device.h> 17 #include <linux/ssb/ssb.h> 18 #include <linux/ssb/ssb_regs.h> 19 #include <linux/ssb/ssb_driver_gige.h> 20 #include <linux/dma-mapping.h> 21 #include <linux/pci.h> 22 #include <linux/mmc/sdio_func.h> 23 #include <linux/slab.h> 24 25 #include <pcmcia/cistpl.h> 26 #include <pcmcia/ds.h> 27 28 29 MODULE_DESCRIPTION("Sonics Silicon Backplane driver"); 30 MODULE_LICENSE("GPL"); 31 32 33 /* Temporary list of yet-to-be-attached buses */ 34 static LIST_HEAD(attach_queue); 35 /* List if running buses */ 36 static LIST_HEAD(buses); 37 /* Software ID counter */ 38 static unsigned int next_busnumber; 39 /* buses_mutes locks the two buslists and the next_busnumber. 40 * Don't lock this directly, but use ssb_buses_[un]lock() below. 41 */ 42 static DEFINE_MUTEX(buses_mutex); 43 44 /* There are differences in the codeflow, if the bus is 45 * initialized from early boot, as various needed services 46 * are not available early. This is a mechanism to delay 47 * these initializations to after early boot has finished. 48 * It's also used to avoid mutex locking, as that's not 49 * available and needed early. 50 */ 51 static bool ssb_is_early_boot = 1; 52 53 static void ssb_buses_lock(void); 54 static void ssb_buses_unlock(void); 55 56 57 #ifdef CONFIG_SSB_PCIHOST 58 struct ssb_bus *ssb_pci_dev_to_bus(struct pci_dev *pdev) 59 { 60 struct ssb_bus *bus; 61 62 ssb_buses_lock(); 63 list_for_each_entry(bus, &buses, list) { 64 if (bus->bustype == SSB_BUSTYPE_PCI && 65 bus->host_pci == pdev) 66 goto found; 67 } 68 bus = NULL; 69 found: 70 ssb_buses_unlock(); 71 72 return bus; 73 } 74 #endif /* CONFIG_SSB_PCIHOST */ 75 76 #ifdef CONFIG_SSB_PCMCIAHOST 77 struct ssb_bus *ssb_pcmcia_dev_to_bus(struct pcmcia_device *pdev) 78 { 79 struct ssb_bus *bus; 80 81 ssb_buses_lock(); 82 list_for_each_entry(bus, &buses, list) { 83 if (bus->bustype == SSB_BUSTYPE_PCMCIA && 84 bus->host_pcmcia == pdev) 85 goto found; 86 } 87 bus = NULL; 88 found: 89 ssb_buses_unlock(); 90 91 return bus; 92 } 93 #endif /* CONFIG_SSB_PCMCIAHOST */ 94 95 int ssb_for_each_bus_call(unsigned long data, 96 int (*func)(struct ssb_bus *bus, unsigned long data)) 97 { 98 struct ssb_bus *bus; 99 int res; 100 101 ssb_buses_lock(); 102 list_for_each_entry(bus, &buses, list) { 103 res = func(bus, data); 104 if (res >= 0) { 105 ssb_buses_unlock(); 106 return res; 107 } 108 } 109 ssb_buses_unlock(); 110 111 return -ENODEV; 112 } 113 114 static struct ssb_device *ssb_device_get(struct ssb_device *dev) 115 { 116 if (dev) 117 get_device(dev->dev); 118 return dev; 119 } 120 121 static void ssb_device_put(struct ssb_device *dev) 122 { 123 if (dev) 124 put_device(dev->dev); 125 } 126 127 static int ssb_device_resume(struct device *dev) 128 { 129 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev); 130 struct ssb_driver *ssb_drv; 131 int err = 0; 132 133 if (dev->driver) { 134 ssb_drv = drv_to_ssb_drv(dev->driver); 135 if (ssb_drv && ssb_drv->resume) 136 err = ssb_drv->resume(ssb_dev); 137 if (err) 138 goto out; 139 } 140 out: 141 return err; 142 } 143 144 static int ssb_device_suspend(struct device *dev, pm_message_t state) 145 { 146 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev); 147 struct ssb_driver *ssb_drv; 148 int err = 0; 149 150 if (dev->driver) { 151 ssb_drv = drv_to_ssb_drv(dev->driver); 152 if (ssb_drv && ssb_drv->suspend) 153 err = ssb_drv->suspend(ssb_dev, state); 154 if (err) 155 goto out; 156 } 157 out: 158 return err; 159 } 160 161 int ssb_bus_resume(struct ssb_bus *bus) 162 { 163 int err; 164 165 /* Reset HW state information in memory, so that HW is 166 * completely reinitialized. 167 */ 168 bus->mapped_device = NULL; 169 #ifdef CONFIG_SSB_DRIVER_PCICORE 170 bus->pcicore.setup_done = 0; 171 #endif 172 173 err = ssb_bus_powerup(bus, 0); 174 if (err) 175 return err; 176 err = ssb_pcmcia_hardware_setup(bus); 177 if (err) { 178 ssb_bus_may_powerdown(bus); 179 return err; 180 } 181 ssb_chipco_resume(&bus->chipco); 182 ssb_bus_may_powerdown(bus); 183 184 return 0; 185 } 186 EXPORT_SYMBOL(ssb_bus_resume); 187 188 int ssb_bus_suspend(struct ssb_bus *bus) 189 { 190 ssb_chipco_suspend(&bus->chipco); 191 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0); 192 193 return 0; 194 } 195 EXPORT_SYMBOL(ssb_bus_suspend); 196 197 #ifdef CONFIG_SSB_SPROM 198 /** ssb_devices_freeze - Freeze all devices on the bus. 199 * 200 * After freezing no device driver will be handling a device 201 * on this bus anymore. ssb_devices_thaw() must be called after 202 * a successful freeze to reactivate the devices. 203 * 204 * @bus: The bus. 205 * @ctx: Context structure. Pass this to ssb_devices_thaw(). 206 */ 207 int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx) 208 { 209 struct ssb_device *sdev; 210 struct ssb_driver *sdrv; 211 unsigned int i; 212 213 memset(ctx, 0, sizeof(*ctx)); 214 ctx->bus = bus; 215 WARN_ON(bus->nr_devices > ARRAY_SIZE(ctx->device_frozen)); 216 217 for (i = 0; i < bus->nr_devices; i++) { 218 sdev = ssb_device_get(&bus->devices[i]); 219 220 if (!sdev->dev || !sdev->dev->driver || 221 !device_is_registered(sdev->dev)) { 222 ssb_device_put(sdev); 223 continue; 224 } 225 sdrv = drv_to_ssb_drv(sdev->dev->driver); 226 if (WARN_ON(!sdrv->remove)) 227 continue; 228 sdrv->remove(sdev); 229 ctx->device_frozen[i] = 1; 230 } 231 232 return 0; 233 } 234 235 /** ssb_devices_thaw - Unfreeze all devices on the bus. 236 * 237 * This will re-attach the device drivers and re-init the devices. 238 * 239 * @ctx: The context structure from ssb_devices_freeze() 240 */ 241 int ssb_devices_thaw(struct ssb_freeze_context *ctx) 242 { 243 struct ssb_bus *bus = ctx->bus; 244 struct ssb_device *sdev; 245 struct ssb_driver *sdrv; 246 unsigned int i; 247 int err, result = 0; 248 249 for (i = 0; i < bus->nr_devices; i++) { 250 if (!ctx->device_frozen[i]) 251 continue; 252 sdev = &bus->devices[i]; 253 254 if (WARN_ON(!sdev->dev || !sdev->dev->driver)) 255 continue; 256 sdrv = drv_to_ssb_drv(sdev->dev->driver); 257 if (WARN_ON(!sdrv || !sdrv->probe)) 258 continue; 259 260 err = sdrv->probe(sdev, &sdev->id); 261 if (err) { 262 dev_err(sdev->dev, 263 "Failed to thaw device %s\n", 264 dev_name(sdev->dev)); 265 result = err; 266 } 267 ssb_device_put(sdev); 268 } 269 270 return result; 271 } 272 #endif /* CONFIG_SSB_SPROM */ 273 274 static void ssb_device_shutdown(struct device *dev) 275 { 276 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev); 277 struct ssb_driver *ssb_drv; 278 279 if (!dev->driver) 280 return; 281 ssb_drv = drv_to_ssb_drv(dev->driver); 282 if (ssb_drv && ssb_drv->shutdown) 283 ssb_drv->shutdown(ssb_dev); 284 } 285 286 static void ssb_device_remove(struct device *dev) 287 { 288 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev); 289 struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver); 290 291 if (ssb_drv && ssb_drv->remove) 292 ssb_drv->remove(ssb_dev); 293 ssb_device_put(ssb_dev); 294 } 295 296 static int ssb_device_probe(struct device *dev) 297 { 298 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev); 299 struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver); 300 int err = 0; 301 302 ssb_device_get(ssb_dev); 303 if (ssb_drv && ssb_drv->probe) 304 err = ssb_drv->probe(ssb_dev, &ssb_dev->id); 305 if (err) 306 ssb_device_put(ssb_dev); 307 308 return err; 309 } 310 311 static int ssb_match_devid(const struct ssb_device_id *tabid, 312 const struct ssb_device_id *devid) 313 { 314 if ((tabid->vendor != devid->vendor) && 315 tabid->vendor != SSB_ANY_VENDOR) 316 return 0; 317 if ((tabid->coreid != devid->coreid) && 318 tabid->coreid != SSB_ANY_ID) 319 return 0; 320 if ((tabid->revision != devid->revision) && 321 tabid->revision != SSB_ANY_REV) 322 return 0; 323 return 1; 324 } 325 326 static int ssb_bus_match(struct device *dev, const struct device_driver *drv) 327 { 328 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev); 329 const struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv); 330 const struct ssb_device_id *id; 331 332 for (id = ssb_drv->id_table; 333 id->vendor || id->coreid || id->revision; 334 id++) { 335 if (ssb_match_devid(id, &ssb_dev->id)) 336 return 1; /* found */ 337 } 338 339 return 0; 340 } 341 342 static int ssb_device_uevent(const struct device *dev, struct kobj_uevent_env *env) 343 { 344 const struct ssb_device *ssb_dev; 345 346 if (!dev) 347 return -ENODEV; 348 349 ssb_dev = dev_to_ssb_dev(dev); 350 351 return add_uevent_var(env, 352 "MODALIAS=ssb:v%04Xid%04Xrev%02X", 353 ssb_dev->id.vendor, ssb_dev->id.coreid, 354 ssb_dev->id.revision); 355 } 356 357 #define ssb_config_attr(attrib, field, format_string) \ 358 static ssize_t \ 359 attrib##_show(struct device *dev, struct device_attribute *attr, char *buf) \ 360 { \ 361 return sprintf(buf, format_string, dev_to_ssb_dev(dev)->field); \ 362 } \ 363 static DEVICE_ATTR_RO(attrib); 364 365 ssb_config_attr(core_num, core_index, "%u\n") 366 ssb_config_attr(coreid, id.coreid, "0x%04x\n") 367 ssb_config_attr(vendor, id.vendor, "0x%04x\n") 368 ssb_config_attr(revision, id.revision, "%u\n") 369 ssb_config_attr(irq, irq, "%u\n") 370 static ssize_t 371 name_show(struct device *dev, struct device_attribute *attr, char *buf) 372 { 373 return sprintf(buf, "%s\n", 374 ssb_core_name(dev_to_ssb_dev(dev)->id.coreid)); 375 } 376 static DEVICE_ATTR_RO(name); 377 378 static struct attribute *ssb_device_attrs[] = { 379 &dev_attr_name.attr, 380 &dev_attr_core_num.attr, 381 &dev_attr_coreid.attr, 382 &dev_attr_vendor.attr, 383 &dev_attr_revision.attr, 384 &dev_attr_irq.attr, 385 NULL, 386 }; 387 ATTRIBUTE_GROUPS(ssb_device); 388 389 static const struct bus_type ssb_bustype = { 390 .name = "ssb", 391 .match = ssb_bus_match, 392 .probe = ssb_device_probe, 393 .remove = ssb_device_remove, 394 .shutdown = ssb_device_shutdown, 395 .suspend = ssb_device_suspend, 396 .resume = ssb_device_resume, 397 .uevent = ssb_device_uevent, 398 .dev_groups = ssb_device_groups, 399 }; 400 401 static void ssb_buses_lock(void) 402 { 403 /* See the comment at the ssb_is_early_boot definition */ 404 if (!ssb_is_early_boot) 405 mutex_lock(&buses_mutex); 406 } 407 408 static void ssb_buses_unlock(void) 409 { 410 /* See the comment at the ssb_is_early_boot definition */ 411 if (!ssb_is_early_boot) 412 mutex_unlock(&buses_mutex); 413 } 414 415 static void ssb_devices_unregister(struct ssb_bus *bus) 416 { 417 struct ssb_device *sdev; 418 int i; 419 420 for (i = bus->nr_devices - 1; i >= 0; i--) { 421 sdev = &(bus->devices[i]); 422 if (sdev->dev) 423 device_unregister(sdev->dev); 424 } 425 426 #ifdef CONFIG_SSB_EMBEDDED 427 if (bus->bustype == SSB_BUSTYPE_SSB) 428 platform_device_unregister(bus->watchdog); 429 #endif 430 } 431 432 void ssb_bus_unregister(struct ssb_bus *bus) 433 { 434 int err; 435 436 err = ssb_gpio_unregister(bus); 437 if (err) 438 pr_debug("Can not unregister GPIO driver: %i\n", err); 439 440 ssb_buses_lock(); 441 ssb_devices_unregister(bus); 442 list_del(&bus->list); 443 ssb_buses_unlock(); 444 445 ssb_pcmcia_exit(bus); 446 ssb_pci_exit(bus); 447 ssb_iounmap(bus); 448 } 449 EXPORT_SYMBOL(ssb_bus_unregister); 450 451 static void ssb_release_dev(struct device *dev) 452 { 453 struct __ssb_dev_wrapper *devwrap; 454 455 devwrap = container_of(dev, struct __ssb_dev_wrapper, dev); 456 kfree(devwrap); 457 } 458 459 static int ssb_devices_register(struct ssb_bus *bus) 460 { 461 struct ssb_device *sdev; 462 struct device *dev; 463 struct __ssb_dev_wrapper *devwrap; 464 int i, err = 0; 465 int dev_idx = 0; 466 467 for (i = 0; i < bus->nr_devices; i++) { 468 sdev = &(bus->devices[i]); 469 470 /* We don't register SSB-system devices to the kernel, 471 * as the drivers for them are built into SSB. 472 */ 473 switch (sdev->id.coreid) { 474 case SSB_DEV_CHIPCOMMON: 475 case SSB_DEV_PCI: 476 case SSB_DEV_PCIE: 477 case SSB_DEV_PCMCIA: 478 case SSB_DEV_MIPS: 479 case SSB_DEV_MIPS_3302: 480 case SSB_DEV_EXTIF: 481 continue; 482 } 483 484 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL); 485 if (!devwrap) { 486 err = -ENOMEM; 487 goto error; 488 } 489 dev = &devwrap->dev; 490 devwrap->sdev = sdev; 491 492 dev->release = ssb_release_dev; 493 dev->bus = &ssb_bustype; 494 dev_set_name(dev, "ssb%u:%d", bus->busnumber, dev_idx); 495 496 switch (bus->bustype) { 497 case SSB_BUSTYPE_PCI: 498 #ifdef CONFIG_SSB_PCIHOST 499 sdev->irq = bus->host_pci->irq; 500 dev->parent = &bus->host_pci->dev; 501 sdev->dma_dev = dev->parent; 502 #endif 503 break; 504 case SSB_BUSTYPE_PCMCIA: 505 #ifdef CONFIG_SSB_PCMCIAHOST 506 sdev->irq = bus->host_pcmcia->irq; 507 dev->parent = &bus->host_pcmcia->dev; 508 #endif 509 break; 510 case SSB_BUSTYPE_SDIO: 511 #ifdef CONFIG_SSB_SDIOHOST 512 dev->parent = &bus->host_sdio->dev; 513 #endif 514 break; 515 case SSB_BUSTYPE_SSB: 516 dev->dma_mask = &dev->coherent_dma_mask; 517 sdev->dma_dev = dev; 518 break; 519 } 520 521 sdev->dev = dev; 522 err = device_register(dev); 523 if (err) { 524 pr_err("Could not register %s\n", dev_name(dev)); 525 /* Set dev to NULL to not unregister 526 * dev on error unwinding. 527 */ 528 sdev->dev = NULL; 529 put_device(dev); 530 goto error; 531 } 532 dev_idx++; 533 } 534 535 #ifdef CONFIG_SSB_DRIVER_MIPS 536 if (bus->mipscore.pflash.present) { 537 err = platform_device_register(&ssb_pflash_dev); 538 if (err) 539 pr_err("Error registering parallel flash\n"); 540 } 541 #endif 542 543 #ifdef CONFIG_SSB_SFLASH 544 if (bus->mipscore.sflash.present) { 545 err = platform_device_register(&ssb_sflash_dev); 546 if (err) 547 pr_err("Error registering serial flash\n"); 548 } 549 #endif 550 551 return 0; 552 error: 553 /* Unwind the already registered devices. */ 554 ssb_devices_unregister(bus); 555 return err; 556 } 557 558 /* Needs ssb_buses_lock() */ 559 static int ssb_attach_queued_buses(void) 560 { 561 struct ssb_bus *bus, *n; 562 int err = 0; 563 int drop_them_all = 0; 564 565 list_for_each_entry_safe(bus, n, &attach_queue, list) { 566 if (drop_them_all) { 567 list_del(&bus->list); 568 continue; 569 } 570 /* Can't init the PCIcore in ssb_bus_register(), as that 571 * is too early in boot for embedded systems 572 * (no udelay() available). So do it here in attach stage. 573 */ 574 err = ssb_bus_powerup(bus, 0); 575 if (err) 576 goto error; 577 ssb_pcicore_init(&bus->pcicore); 578 if (bus->bustype == SSB_BUSTYPE_SSB) 579 ssb_watchdog_register(bus); 580 581 err = ssb_gpio_init(bus); 582 if (err == -ENOTSUPP) 583 pr_debug("GPIO driver not activated\n"); 584 else if (err) 585 pr_debug("Error registering GPIO driver: %i\n", err); 586 587 ssb_bus_may_powerdown(bus); 588 589 err = ssb_devices_register(bus); 590 error: 591 if (err) { 592 drop_them_all = 1; 593 list_del(&bus->list); 594 continue; 595 } 596 list_move_tail(&bus->list, &buses); 597 } 598 599 return err; 600 } 601 602 static int ssb_fetch_invariants(struct ssb_bus *bus, 603 ssb_invariants_func_t get_invariants) 604 { 605 struct ssb_init_invariants iv; 606 int err; 607 608 memset(&iv, 0, sizeof(iv)); 609 err = get_invariants(bus, &iv); 610 if (err) 611 goto out; 612 memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo)); 613 memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom)); 614 bus->has_cardbus_slot = iv.has_cardbus_slot; 615 out: 616 return err; 617 } 618 619 static int __maybe_unused 620 ssb_bus_register(struct ssb_bus *bus, 621 ssb_invariants_func_t get_invariants, 622 unsigned long baseaddr) 623 { 624 int err; 625 626 spin_lock_init(&bus->bar_lock); 627 INIT_LIST_HEAD(&bus->list); 628 #ifdef CONFIG_SSB_EMBEDDED 629 spin_lock_init(&bus->gpio_lock); 630 #endif 631 632 /* Powerup the bus */ 633 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1); 634 if (err) 635 goto out; 636 637 /* Init SDIO-host device (if any), before the scan */ 638 err = ssb_sdio_init(bus); 639 if (err) 640 goto err_disable_xtal; 641 642 ssb_buses_lock(); 643 bus->busnumber = next_busnumber; 644 /* Scan for devices (cores) */ 645 err = ssb_bus_scan(bus, baseaddr); 646 if (err) 647 goto err_sdio_exit; 648 649 /* Init PCI-host device (if any) */ 650 err = ssb_pci_init(bus); 651 if (err) 652 goto err_unmap; 653 /* Init PCMCIA-host device (if any) */ 654 err = ssb_pcmcia_init(bus); 655 if (err) 656 goto err_pci_exit; 657 658 /* Initialize basic system devices (if available) */ 659 err = ssb_bus_powerup(bus, 0); 660 if (err) 661 goto err_pcmcia_exit; 662 ssb_chipcommon_init(&bus->chipco); 663 ssb_extif_init(&bus->extif); 664 ssb_mipscore_init(&bus->mipscore); 665 err = ssb_fetch_invariants(bus, get_invariants); 666 if (err) { 667 ssb_bus_may_powerdown(bus); 668 goto err_pcmcia_exit; 669 } 670 ssb_bus_may_powerdown(bus); 671 672 /* Queue it for attach. 673 * See the comment at the ssb_is_early_boot definition. 674 */ 675 list_add_tail(&bus->list, &attach_queue); 676 if (!ssb_is_early_boot) { 677 /* This is not early boot, so we must attach the bus now */ 678 err = ssb_attach_queued_buses(); 679 if (err) 680 goto err_dequeue; 681 } 682 next_busnumber++; 683 ssb_buses_unlock(); 684 685 out: 686 return err; 687 688 err_dequeue: 689 list_del(&bus->list); 690 err_pcmcia_exit: 691 ssb_pcmcia_exit(bus); 692 err_pci_exit: 693 ssb_pci_exit(bus); 694 err_unmap: 695 ssb_iounmap(bus); 696 err_sdio_exit: 697 ssb_sdio_exit(bus); 698 err_disable_xtal: 699 ssb_buses_unlock(); 700 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0); 701 return err; 702 } 703 704 #ifdef CONFIG_SSB_PCIHOST 705 int ssb_bus_pcibus_register(struct ssb_bus *bus, struct pci_dev *host_pci) 706 { 707 int err; 708 709 bus->bustype = SSB_BUSTYPE_PCI; 710 bus->host_pci = host_pci; 711 bus->ops = &ssb_pci_ops; 712 713 err = ssb_bus_register(bus, ssb_pci_get_invariants, 0); 714 if (!err) { 715 dev_info(&host_pci->dev, 716 "Sonics Silicon Backplane found on PCI device %s\n", 717 dev_name(&host_pci->dev)); 718 } else { 719 dev_err(&host_pci->dev, 720 "Failed to register PCI version of SSB with error %d\n", 721 err); 722 } 723 724 return err; 725 } 726 #endif /* CONFIG_SSB_PCIHOST */ 727 728 #ifdef CONFIG_SSB_PCMCIAHOST 729 int ssb_bus_pcmciabus_register(struct ssb_bus *bus, 730 struct pcmcia_device *pcmcia_dev, 731 unsigned long baseaddr) 732 { 733 int err; 734 735 bus->bustype = SSB_BUSTYPE_PCMCIA; 736 bus->host_pcmcia = pcmcia_dev; 737 bus->ops = &ssb_pcmcia_ops; 738 739 err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr); 740 if (!err) { 741 dev_info(&pcmcia_dev->dev, 742 "Sonics Silicon Backplane found on PCMCIA device %s\n", 743 pcmcia_dev->devname); 744 } 745 746 return err; 747 } 748 #endif /* CONFIG_SSB_PCMCIAHOST */ 749 750 #ifdef CONFIG_SSB_SDIOHOST 751 int ssb_bus_sdiobus_register(struct ssb_bus *bus, struct sdio_func *func, 752 unsigned int quirks) 753 { 754 int err; 755 756 bus->bustype = SSB_BUSTYPE_SDIO; 757 bus->host_sdio = func; 758 bus->ops = &ssb_sdio_ops; 759 bus->quirks = quirks; 760 761 err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0); 762 if (!err) { 763 dev_info(&func->dev, 764 "Sonics Silicon Backplane found on SDIO device %s\n", 765 sdio_func_id(func)); 766 } 767 768 return err; 769 } 770 EXPORT_SYMBOL(ssb_bus_sdiobus_register); 771 #endif /* CONFIG_SSB_PCMCIAHOST */ 772 773 #ifdef CONFIG_SSB_HOST_SOC 774 int ssb_bus_host_soc_register(struct ssb_bus *bus, unsigned long baseaddr) 775 { 776 int err; 777 778 bus->bustype = SSB_BUSTYPE_SSB; 779 bus->ops = &ssb_host_soc_ops; 780 781 err = ssb_bus_register(bus, ssb_host_soc_get_invariants, baseaddr); 782 if (!err) { 783 pr_info("Sonics Silicon Backplane found at address 0x%08lX\n", 784 baseaddr); 785 } 786 787 return err; 788 } 789 #endif 790 791 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner) 792 { 793 drv->drv.name = drv->name; 794 drv->drv.bus = &ssb_bustype; 795 drv->drv.owner = owner; 796 797 return driver_register(&drv->drv); 798 } 799 EXPORT_SYMBOL(__ssb_driver_register); 800 801 void ssb_driver_unregister(struct ssb_driver *drv) 802 { 803 driver_unregister(&drv->drv); 804 } 805 EXPORT_SYMBOL(ssb_driver_unregister); 806 807 void ssb_set_devtypedata(struct ssb_device *dev, void *data) 808 { 809 struct ssb_bus *bus = dev->bus; 810 struct ssb_device *ent; 811 int i; 812 813 for (i = 0; i < bus->nr_devices; i++) { 814 ent = &(bus->devices[i]); 815 if (ent->id.vendor != dev->id.vendor) 816 continue; 817 if (ent->id.coreid != dev->id.coreid) 818 continue; 819 820 ent->devtypedata = data; 821 } 822 } 823 EXPORT_SYMBOL(ssb_set_devtypedata); 824 825 static u32 clkfactor_f6_resolve(u32 v) 826 { 827 /* map the magic values */ 828 switch (v) { 829 case SSB_CHIPCO_CLK_F6_2: 830 return 2; 831 case SSB_CHIPCO_CLK_F6_3: 832 return 3; 833 case SSB_CHIPCO_CLK_F6_4: 834 return 4; 835 case SSB_CHIPCO_CLK_F6_5: 836 return 5; 837 case SSB_CHIPCO_CLK_F6_6: 838 return 6; 839 case SSB_CHIPCO_CLK_F6_7: 840 return 7; 841 } 842 return 1; 843 } 844 845 /* Calculate the speed the backplane would run at a given set of clockcontrol values */ 846 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m) 847 { 848 u32 n1, n2, clock, m1, m2, m3, mc; 849 850 n1 = (n & SSB_CHIPCO_CLK_N1); 851 n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT); 852 853 switch (plltype) { 854 case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */ 855 if (m & SSB_CHIPCO_CLK_T6_MMASK) 856 return SSB_CHIPCO_CLK_T6_M1; 857 return SSB_CHIPCO_CLK_T6_M0; 858 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */ 859 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */ 860 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */ 861 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */ 862 n1 = clkfactor_f6_resolve(n1); 863 n2 += SSB_CHIPCO_CLK_F5_BIAS; 864 break; 865 case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */ 866 n1 += SSB_CHIPCO_CLK_T2_BIAS; 867 n2 += SSB_CHIPCO_CLK_T2_BIAS; 868 WARN_ON(!((n1 >= 2) && (n1 <= 7))); 869 WARN_ON(!((n2 >= 5) && (n2 <= 23))); 870 break; 871 case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */ 872 return 100000000; 873 default: 874 WARN_ON(1); 875 } 876 877 switch (plltype) { 878 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */ 879 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */ 880 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2; 881 break; 882 default: 883 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2; 884 } 885 if (!clock) 886 return 0; 887 888 m1 = (m & SSB_CHIPCO_CLK_M1); 889 m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT); 890 m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT); 891 mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT); 892 893 switch (plltype) { 894 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */ 895 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */ 896 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */ 897 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */ 898 m1 = clkfactor_f6_resolve(m1); 899 if ((plltype == SSB_PLLTYPE_1) || 900 (plltype == SSB_PLLTYPE_3)) 901 m2 += SSB_CHIPCO_CLK_F5_BIAS; 902 else 903 m2 = clkfactor_f6_resolve(m2); 904 m3 = clkfactor_f6_resolve(m3); 905 906 switch (mc) { 907 case SSB_CHIPCO_CLK_MC_BYPASS: 908 return clock; 909 case SSB_CHIPCO_CLK_MC_M1: 910 return (clock / m1); 911 case SSB_CHIPCO_CLK_MC_M1M2: 912 return (clock / (m1 * m2)); 913 case SSB_CHIPCO_CLK_MC_M1M2M3: 914 return (clock / (m1 * m2 * m3)); 915 case SSB_CHIPCO_CLK_MC_M1M3: 916 return (clock / (m1 * m3)); 917 } 918 return 0; 919 case SSB_PLLTYPE_2: 920 m1 += SSB_CHIPCO_CLK_T2_BIAS; 921 m2 += SSB_CHIPCO_CLK_T2M2_BIAS; 922 m3 += SSB_CHIPCO_CLK_T2_BIAS; 923 WARN_ON(!((m1 >= 2) && (m1 <= 7))); 924 WARN_ON(!((m2 >= 3) && (m2 <= 10))); 925 WARN_ON(!((m3 >= 2) && (m3 <= 7))); 926 927 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP)) 928 clock /= m1; 929 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP)) 930 clock /= m2; 931 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP)) 932 clock /= m3; 933 return clock; 934 default: 935 WARN_ON(1); 936 } 937 return 0; 938 } 939 940 /* Get the current speed the backplane is running at */ 941 u32 ssb_clockspeed(struct ssb_bus *bus) 942 { 943 u32 rate; 944 u32 plltype; 945 u32 clkctl_n, clkctl_m; 946 947 if (bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU) 948 return ssb_pmu_get_controlclock(&bus->chipco); 949 950 if (ssb_extif_available(&bus->extif)) 951 ssb_extif_get_clockcontrol(&bus->extif, &plltype, 952 &clkctl_n, &clkctl_m); 953 else if (bus->chipco.dev) 954 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype, 955 &clkctl_n, &clkctl_m); 956 else 957 return 0; 958 959 if (bus->chip_id == 0x5365) { 960 rate = 100000000; 961 } else { 962 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m); 963 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */ 964 rate /= 2; 965 } 966 967 return rate; 968 } 969 EXPORT_SYMBOL(ssb_clockspeed); 970 971 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev) 972 { 973 u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV; 974 975 /* The REJECT bit seems to be different for Backplane rev 2.3 */ 976 switch (rev) { 977 case SSB_IDLOW_SSBREV_22: 978 case SSB_IDLOW_SSBREV_24: 979 case SSB_IDLOW_SSBREV_26: 980 return SSB_TMSLOW_REJECT; 981 case SSB_IDLOW_SSBREV_23: 982 return SSB_TMSLOW_REJECT_23; 983 case SSB_IDLOW_SSBREV_25: /* TODO - find the proper REJECT bit */ 984 case SSB_IDLOW_SSBREV_27: /* same here */ 985 return SSB_TMSLOW_REJECT; /* this is a guess */ 986 case SSB_IDLOW_SSBREV: 987 break; 988 default: 989 WARN(1, KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev); 990 } 991 return (SSB_TMSLOW_REJECT | SSB_TMSLOW_REJECT_23); 992 } 993 994 int ssb_device_is_enabled(struct ssb_device *dev) 995 { 996 u32 val; 997 u32 reject; 998 999 reject = ssb_tmslow_reject_bitmask(dev); 1000 val = ssb_read32(dev, SSB_TMSLOW); 1001 val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject; 1002 1003 return (val == SSB_TMSLOW_CLOCK); 1004 } 1005 EXPORT_SYMBOL(ssb_device_is_enabled); 1006 1007 static void ssb_flush_tmslow(struct ssb_device *dev) 1008 { 1009 /* Make _really_ sure the device has finished the TMSLOW 1010 * register write transaction, as we risk running into 1011 * a machine check exception otherwise. 1012 * Do this by reading the register back to commit the 1013 * PCI write and delay an additional usec for the device 1014 * to react to the change. 1015 */ 1016 ssb_read32(dev, SSB_TMSLOW); 1017 udelay(1); 1018 } 1019 1020 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags) 1021 { 1022 u32 val; 1023 1024 ssb_device_disable(dev, core_specific_flags); 1025 ssb_write32(dev, SSB_TMSLOW, 1026 SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK | 1027 SSB_TMSLOW_FGC | core_specific_flags); 1028 ssb_flush_tmslow(dev); 1029 1030 /* Clear SERR if set. This is a hw bug workaround. */ 1031 if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR) 1032 ssb_write32(dev, SSB_TMSHIGH, 0); 1033 1034 val = ssb_read32(dev, SSB_IMSTATE); 1035 if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) { 1036 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO); 1037 ssb_write32(dev, SSB_IMSTATE, val); 1038 } 1039 1040 ssb_write32(dev, SSB_TMSLOW, 1041 SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC | 1042 core_specific_flags); 1043 ssb_flush_tmslow(dev); 1044 1045 ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK | 1046 core_specific_flags); 1047 ssb_flush_tmslow(dev); 1048 } 1049 EXPORT_SYMBOL(ssb_device_enable); 1050 1051 /* Wait for bitmask in a register to get set or cleared. 1052 * timeout is in units of ten-microseconds 1053 */ 1054 static int ssb_wait_bits(struct ssb_device *dev, u16 reg, u32 bitmask, 1055 int timeout, int set) 1056 { 1057 int i; 1058 u32 val; 1059 1060 for (i = 0; i < timeout; i++) { 1061 val = ssb_read32(dev, reg); 1062 if (set) { 1063 if ((val & bitmask) == bitmask) 1064 return 0; 1065 } else { 1066 if (!(val & bitmask)) 1067 return 0; 1068 } 1069 udelay(10); 1070 } 1071 dev_err(dev->dev, 1072 "Timeout waiting for bitmask %08X on register %04X to %s\n", 1073 bitmask, reg, set ? "set" : "clear"); 1074 1075 return -ETIMEDOUT; 1076 } 1077 1078 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags) 1079 { 1080 u32 reject, val; 1081 1082 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET) 1083 return; 1084 1085 reject = ssb_tmslow_reject_bitmask(dev); 1086 1087 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_CLOCK) { 1088 ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK); 1089 ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1); 1090 ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0); 1091 1092 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) { 1093 val = ssb_read32(dev, SSB_IMSTATE); 1094 val |= SSB_IMSTATE_REJECT; 1095 ssb_write32(dev, SSB_IMSTATE, val); 1096 ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000, 1097 0); 1098 } 1099 1100 ssb_write32(dev, SSB_TMSLOW, 1101 SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK | 1102 reject | SSB_TMSLOW_RESET | 1103 core_specific_flags); 1104 ssb_flush_tmslow(dev); 1105 1106 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) { 1107 val = ssb_read32(dev, SSB_IMSTATE); 1108 val &= ~SSB_IMSTATE_REJECT; 1109 ssb_write32(dev, SSB_IMSTATE, val); 1110 } 1111 } 1112 1113 ssb_write32(dev, SSB_TMSLOW, 1114 reject | SSB_TMSLOW_RESET | 1115 core_specific_flags); 1116 ssb_flush_tmslow(dev); 1117 } 1118 EXPORT_SYMBOL(ssb_device_disable); 1119 1120 /* Some chipsets need routing known for PCIe and 64-bit DMA */ 1121 static bool ssb_dma_translation_special_bit(struct ssb_device *dev) 1122 { 1123 u16 chip_id = dev->bus->chip_id; 1124 1125 if (dev->id.coreid == SSB_DEV_80211) { 1126 return (chip_id == 0x4322 || chip_id == 43221 || 1127 chip_id == 43231 || chip_id == 43222); 1128 } 1129 1130 return false; 1131 } 1132 1133 u32 ssb_dma_translation(struct ssb_device *dev) 1134 { 1135 switch (dev->bus->bustype) { 1136 case SSB_BUSTYPE_SSB: 1137 return 0; 1138 case SSB_BUSTYPE_PCI: 1139 if (pci_is_pcie(dev->bus->host_pci) && 1140 ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_DMA64) { 1141 return SSB_PCIE_DMA_H32; 1142 } else { 1143 if (ssb_dma_translation_special_bit(dev)) 1144 return SSB_PCIE_DMA_H32; 1145 else 1146 return SSB_PCI_DMA; 1147 } 1148 default: 1149 break; 1150 } 1151 return 0; 1152 } 1153 EXPORT_SYMBOL(ssb_dma_translation); 1154 1155 int ssb_bus_may_powerdown(struct ssb_bus *bus) 1156 { 1157 struct ssb_chipcommon *cc; 1158 int err = 0; 1159 1160 /* On buses where more than one core may be working 1161 * at a time, we must not powerdown stuff if there are 1162 * still cores that may want to run. 1163 */ 1164 if (bus->bustype == SSB_BUSTYPE_SSB) 1165 goto out; 1166 1167 cc = &bus->chipco; 1168 1169 if (!cc->dev) 1170 goto out; 1171 if (cc->dev->id.revision < 5) 1172 goto out; 1173 1174 ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW); 1175 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0); 1176 if (err) 1177 goto error; 1178 out: 1179 bus->powered_up = 0; 1180 return err; 1181 error: 1182 pr_err("Bus powerdown failed\n"); 1183 goto out; 1184 } 1185 EXPORT_SYMBOL(ssb_bus_may_powerdown); 1186 1187 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl) 1188 { 1189 int err; 1190 enum ssb_clkmode mode; 1191 1192 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1); 1193 if (err) 1194 goto error; 1195 1196 bus->powered_up = 1; 1197 1198 mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST; 1199 ssb_chipco_set_clockmode(&bus->chipco, mode); 1200 1201 return 0; 1202 error: 1203 pr_err("Bus powerup failed\n"); 1204 return err; 1205 } 1206 EXPORT_SYMBOL(ssb_bus_powerup); 1207 1208 static void ssb_broadcast_value(struct ssb_device *dev, 1209 u32 address, u32 data) 1210 { 1211 #ifdef CONFIG_SSB_DRIVER_PCICORE 1212 /* This is used for both, PCI and ChipCommon core, so be careful. */ 1213 BUILD_BUG_ON(SSB_PCICORE_BCAST_ADDR != SSB_CHIPCO_BCAST_ADDR); 1214 BUILD_BUG_ON(SSB_PCICORE_BCAST_DATA != SSB_CHIPCO_BCAST_DATA); 1215 #endif 1216 1217 ssb_write32(dev, SSB_CHIPCO_BCAST_ADDR, address); 1218 ssb_read32(dev, SSB_CHIPCO_BCAST_ADDR); /* flush */ 1219 ssb_write32(dev, SSB_CHIPCO_BCAST_DATA, data); 1220 ssb_read32(dev, SSB_CHIPCO_BCAST_DATA); /* flush */ 1221 } 1222 1223 void ssb_commit_settings(struct ssb_bus *bus) 1224 { 1225 struct ssb_device *dev; 1226 1227 #ifdef CONFIG_SSB_DRIVER_PCICORE 1228 dev = bus->chipco.dev ? bus->chipco.dev : bus->pcicore.dev; 1229 #else 1230 dev = bus->chipco.dev; 1231 #endif 1232 if (WARN_ON(!dev)) 1233 return; 1234 /* This forces an update of the cached registers. */ 1235 ssb_broadcast_value(dev, 0xFD8, 0); 1236 } 1237 EXPORT_SYMBOL(ssb_commit_settings); 1238 1239 u32 ssb_admatch_base(u32 adm) 1240 { 1241 u32 base = 0; 1242 1243 switch (adm & SSB_ADM_TYPE) { 1244 case SSB_ADM_TYPE0: 1245 base = (adm & SSB_ADM_BASE0); 1246 break; 1247 case SSB_ADM_TYPE1: 1248 WARN_ON(adm & SSB_ADM_NEG); /* unsupported */ 1249 base = (adm & SSB_ADM_BASE1); 1250 break; 1251 case SSB_ADM_TYPE2: 1252 WARN_ON(adm & SSB_ADM_NEG); /* unsupported */ 1253 base = (adm & SSB_ADM_BASE2); 1254 break; 1255 default: 1256 WARN_ON(1); 1257 } 1258 1259 return base; 1260 } 1261 EXPORT_SYMBOL(ssb_admatch_base); 1262 1263 u32 ssb_admatch_size(u32 adm) 1264 { 1265 u32 size = 0; 1266 1267 switch (adm & SSB_ADM_TYPE) { 1268 case SSB_ADM_TYPE0: 1269 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT); 1270 break; 1271 case SSB_ADM_TYPE1: 1272 WARN_ON(adm & SSB_ADM_NEG); /* unsupported */ 1273 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT); 1274 break; 1275 case SSB_ADM_TYPE2: 1276 WARN_ON(adm & SSB_ADM_NEG); /* unsupported */ 1277 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT); 1278 break; 1279 default: 1280 WARN_ON(1); 1281 } 1282 size = (1 << (size + 1)); 1283 1284 return size; 1285 } 1286 EXPORT_SYMBOL(ssb_admatch_size); 1287 1288 static int __init ssb_modinit(void) 1289 { 1290 int err; 1291 1292 /* See the comment at the ssb_is_early_boot definition */ 1293 ssb_is_early_boot = 0; 1294 err = bus_register(&ssb_bustype); 1295 if (err) 1296 return err; 1297 1298 /* Maybe we already registered some buses at early boot. 1299 * Check for this and attach them 1300 */ 1301 ssb_buses_lock(); 1302 err = ssb_attach_queued_buses(); 1303 ssb_buses_unlock(); 1304 if (err) { 1305 bus_unregister(&ssb_bustype); 1306 goto out; 1307 } 1308 1309 err = b43_pci_ssb_bridge_init(); 1310 if (err) { 1311 pr_err("Broadcom 43xx PCI-SSB-bridge initialization failed\n"); 1312 /* don't fail SSB init because of this */ 1313 } 1314 err = ssb_host_pcmcia_init(); 1315 if (err) { 1316 pr_err("PCMCIA host initialization failed\n"); 1317 /* don't fail SSB init because of this */ 1318 } 1319 err = ssb_gige_init(); 1320 if (err) { 1321 pr_err("SSB Broadcom Gigabit Ethernet driver initialization failed\n"); 1322 /* don't fail SSB init because of this */ 1323 err = 0; 1324 } 1325 out: 1326 return err; 1327 } 1328 /* ssb must be initialized after PCI but before the ssb drivers. 1329 * That means we must use some initcall between subsys_initcall 1330 * and device_initcall. 1331 */ 1332 fs_initcall(ssb_modinit); 1333 1334 static void __exit ssb_modexit(void) 1335 { 1336 ssb_gige_exit(); 1337 ssb_host_pcmcia_exit(); 1338 b43_pci_ssb_bridge_exit(); 1339 bus_unregister(&ssb_bustype); 1340 } 1341 module_exit(ssb_modexit) 1342