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