drivers/ssb/driver_pcicore.c

   1 /*
   2  * Sonics Silicon Backplane
   3  * Broadcom PCI-core driver
   4  *
   5  * Copyright 2005, Broadcom Corporation
   6  * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de>
   7  *
   8  * Licensed under the GNU/GPL. See COPYING for details.
   9  */
  10
  11 #include <linux/ssb/ssb.h>
  12 #include <linux/pci.h>
  13 #include <linux/delay.h>
  14 #include <linux/ssb/ssb_embedded.h>
  15
  16 #include "ssb_private.h"
  17
  18
  19 static inline
  20 u32 pcicore_read32(struct ssb_pcicore *pc, u16 offset)
  21 {
  22         return ssb_read32(pc->dev, offset);
  23 }
  24
  25 static inline
  26 void pcicore_write32(struct ssb_pcicore *pc, u16 offset, u32 value)
  27 {
  28         ssb_write32(pc->dev, offset, value);
  29 }
  30
  31 static inline
  32 u16 pcicore_read16(struct ssb_pcicore *pc, u16 offset)
  33 {
  34         return ssb_read16(pc->dev, offset);
  35 }
  36
  37 static inline
  38 void pcicore_write16(struct ssb_pcicore *pc, u16 offset, u16 value)
  39 {
  40         ssb_write16(pc->dev, offset, value);
  41 }
  42
  43 /**************************************************
  44  * Code for hostmode operation.
  45  **************************************************/
  46
  47 #ifdef CONFIG_SSB_PCICORE_HOSTMODE
  48
  49 #include <asm/paccess.h>
  50 /* Probe a 32bit value on the bus and catch bus exceptions.
  51  * Returns nonzero on a bus exception.
  52  * This is MIPS specific */
  53 #define mips_busprobe32(val, addr)      get_dbe((val), ((u32 *)(addr)))
  54
  55 /* Assume one-hot slot wiring */
  56 #define SSB_PCI_SLOT_MAX        16
  57
  58 /* Global lock is OK, as we won't have more than one extpci anyway. */
  59 static DEFINE_SPINLOCK(cfgspace_lock);
  60 /* Core to access the external PCI config space. Can only have one. */
  61 static struct ssb_pcicore *extpci_core;
  62
  63
  64 static u32 get_cfgspace_addr(struct ssb_pcicore *pc,
  65                              unsigned int bus, unsigned int dev,
  66                              unsigned int func, unsigned int off)
  67 {
  68         u32 addr = 0;
  69         u32 tmp;
  70
  71         /* We do only have one cardbus device behind the bridge. */
  72         if (pc->cardbusmode && (dev >= 1))
  73                 goto out;
  74
  75         if (bus == 0) {
  76                 /* Type 0 transaction */
  77                 if (unlikely(dev >= SSB_PCI_SLOT_MAX))
  78                         goto out;
  79                 /* Slide the window */
  80                 tmp = SSB_PCICORE_SBTOPCI_CFG0;
  81                 tmp |= ((1 << (dev + 16)) & SSB_PCICORE_SBTOPCI1_MASK);
  82                 pcicore_write32(pc, SSB_PCICORE_SBTOPCI1, tmp);
  83                 /* Calculate the address */
  84                 addr = SSB_PCI_CFG;
  85                 addr |= ((1 << (dev + 16)) & ~SSB_PCICORE_SBTOPCI1_MASK);
  86                 addr |= (func << 8);
  87                 addr |= (off & ~3);
  88         } else {
  89                 /* Type 1 transaction */
  90                 pcicore_write32(pc, SSB_PCICORE_SBTOPCI1,
  91                                 SSB_PCICORE_SBTOPCI_CFG1);
  92                 /* Calculate the address */
  93                 addr = SSB_PCI_CFG;
  94                 addr |= (bus << 16);
  95                 addr |= (dev << 11);
  96                 addr |= (func << 8);
  97                 addr |= (off & ~3);
  98         }
  99 out:
 100         return addr;
 101 }
 102
 103 static int ssb_extpci_read_config(struct ssb_pcicore *pc,
 104                                   unsigned int bus, unsigned int dev,
 105                                   unsigned int func, unsigned int off,
 106                                   void *buf, int len)
 107 {
 108         int err = -EINVAL;
 109         u32 addr, val;
 110         void __iomem *mmio;
 111
 112         SSB_WARN_ON(!pc->hostmode);
 113         if (unlikely(len != 1 && len != 2 && len != 4))
 114                 goto out;
 115         addr = get_cfgspace_addr(pc, bus, dev, func, off);
 116         if (unlikely(!addr))
 117                 goto out;
 118         err = -ENOMEM;
 119         mmio = ioremap_nocache(addr, len);
 120         if (!mmio)
 121                 goto out;
 122
 123         if (mips_busprobe32(val, mmio)) {
 124                 val = 0xffffffff;
 125                 goto unmap;
 126         }
 127
 128         val = readl(mmio);
 129         val >>= (8 * (off & 3));
 130
 131         switch (len) {
 132         case 1:
 133                 *((u8 *)buf) = (u8)val;
 134                 break;
 135         case 2:
 136                 *((u16 *)buf) = (u16)val;
 137                 break;
 138         case 4:
 139                 *((u32 *)buf) = (u32)val;
 140                 break;
 141         }
 142         err = 0;
 143 unmap:
 144         iounmap(mmio);
 145 out:
 146         return err;
 147 }
 148
 149 static int ssb_extpci_write_config(struct ssb_pcicore *pc,
 150                                    unsigned int bus, unsigned int dev,
 151                                    unsigned int func, unsigned int off,
 152                                    const void *buf, int len)
 153 {
 154         int err = -EINVAL;
 155         u32 addr, val = 0;
 156         void __iomem *mmio;
 157
 158         SSB_WARN_ON(!pc->hostmode);
 159         if (unlikely(len != 1 && len != 2 && len != 4))
 160                 goto out;
 161         addr = get_cfgspace_addr(pc, bus, dev, func, off);
 162         if (unlikely(!addr))
 163                 goto out;
 164         err = -ENOMEM;
 165         mmio = ioremap_nocache(addr, len);
 166         if (!mmio)
 167                 goto out;
 168
 169         if (mips_busprobe32(val, mmio)) {
 170                 val = 0xffffffff;
 171                 goto unmap;
 172         }
 173
 174         switch (len) {
 175         case 1:
 176                 val = readl(mmio);
 177                 val &= ~(0xFF << (8 * (off & 3)));
 178                 val |= *((const u8 *)buf) << (8 * (off & 3));
 179                 break;
 180         case 2:
 181                 val = readl(mmio);
 182                 val &= ~(0xFFFF << (8 * (off & 3)));
 183                 val |= *((const u16 *)buf) << (8 * (off & 3));
 184                 break;
 185         case 4:
 186                 val = *((const u32 *)buf);
 187                 break;
 188         }
 189         writel(val, mmio);
 190
 191         err = 0;
 192 unmap:
 193         iounmap(mmio);
 194 out:
 195         return err;
 196 }
 197
 198 static int ssb_pcicore_read_config(struct pci_bus *bus, unsigned int devfn,
 199                                    int reg, int size, u32 *val)
 200 {
 201         unsigned long flags;
 202         int err;
 203
 204         spin_lock_irqsave(&cfgspace_lock, flags);
 205         err = ssb_extpci_read_config(extpci_core, bus->number, PCI_SLOT(devfn),
 206                                      PCI_FUNC(devfn), reg, val, size);
 207         spin_unlock_irqrestore(&cfgspace_lock, flags);
 208
 209         return err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
 210 }
 211
 212 static int ssb_pcicore_write_config(struct pci_bus *bus, unsigned int devfn,
 213                                     int reg, int size, u32 val)
 214 {
 215         unsigned long flags;
 216         int err;
 217
 218         spin_lock_irqsave(&cfgspace_lock, flags);
 219         err = ssb_extpci_write_config(extpci_core, bus->number, PCI_SLOT(devfn),
 220                                       PCI_FUNC(devfn), reg, &val, size);
 221         spin_unlock_irqrestore(&cfgspace_lock, flags);
 222
 223         return err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
 224 }
 225
 226 static struct pci_ops ssb_pcicore_pciops = {
 227         .read   = ssb_pcicore_read_config,
 228         .write  = ssb_pcicore_write_config,
 229 };
 230
 231 static struct resource ssb_pcicore_mem_resource = {
 232         .name   = "SSB PCIcore external memory",
 233         .start  = SSB_PCI_DMA,
 234         .end    = SSB_PCI_DMA + SSB_PCI_DMA_SZ - 1,
 235         .flags  = IORESOURCE_MEM | IORESOURCE_PCI_FIXED,
 236 };
 237
 238 static struct resource ssb_pcicore_io_resource = {
 239         .name   = "SSB PCIcore external I/O",
 240         .start  = 0x100,
 241         .end    = 0x7FF,
 242         .flags  = IORESOURCE_IO | IORESOURCE_PCI_FIXED,
 243 };
 244
 245 static struct pci_controller ssb_pcicore_controller = {
 246         .pci_ops        = &ssb_pcicore_pciops,
 247         .io_resource    = &ssb_pcicore_io_resource,
 248         .mem_resource   = &ssb_pcicore_mem_resource,
 249         .mem_offset     = 0x24000000,
 250 };
 251
 252 static u32 ssb_pcicore_pcibus_iobase = 0x100;
 253 static u32 ssb_pcicore_pcibus_membase = SSB_PCI_DMA;
 254
 255 /* This function is called when doing a pci_enable_device().
 256  * We must first check if the device is a device on the PCI-core bridge. */
 257 int ssb_pcicore_plat_dev_init(struct pci_dev *d)
 258 {
 259         struct resource *res;
 260         int pos, size;
 261         u32 *base;
 262
 263         if (d->bus->ops != &ssb_pcicore_pciops) {
 264                 /* This is not a device on the PCI-core bridge. */
 265                 return -ENODEV;
 266         }
 267
 268         ssb_printk(KERN_INFO "PCI: Fixing up device %s\n",
 269                    pci_name(d));
 270
 271         /* Fix up resource bases */
 272         for (pos = 0; pos < 6; pos++) {
 273                 res = &d->resource[pos];
 274                 if (res->flags & IORESOURCE_IO)
 275                         base = &ssb_pcicore_pcibus_iobase;
 276                 else
 277                         base = &ssb_pcicore_pcibus_membase;
 278                 res->flags |= IORESOURCE_PCI_FIXED;
 279                 if (res->end) {
 280                         size = res->end - res->start + 1;
 281                         if (*base & (size - 1))
 282                                 *base = (*base + size) & ~(size - 1);
 283                         res->start = *base;
 284                         res->end = res->start + size - 1;
 285                         *base += size;
 286                         pci_write_config_dword(d, PCI_BASE_ADDRESS_0 + (pos << 2), res->start);
 287                 }
 288                 /* Fix up PCI bridge BAR0 only */
 289                 if (d->bus->number == 0 && PCI_SLOT(d->devfn) == 0)
 290                         break;
 291         }
 292         /* Fix up interrupt lines */
 293         d->irq = ssb_mips_irq(extpci_core->dev) + 2;
 294         pci_write_config_byte(d, PCI_INTERRUPT_LINE, d->irq);
 295
 296         return 0;
 297 }
 298
 299 /* Early PCI fixup for a device on the PCI-core bridge. */
 300 static void ssb_pcicore_fixup_pcibridge(struct pci_dev *dev)
 301 {
 302         u8 lat;
 303
 304         if (dev->bus->ops != &ssb_pcicore_pciops) {
 305                 /* This is not a device on the PCI-core bridge. */
 306                 return;
 307         }
 308         if (dev->bus->number != 0 || PCI_SLOT(dev->devfn) != 0)
 309                 return;
 310
 311         ssb_printk(KERN_INFO "PCI: Fixing up bridge %s\n", pci_name(dev));
 312
 313         /* Enable PCI bridge bus mastering and memory space */
 314         pci_set_master(dev);
 315         if (pcibios_enable_device(dev, ~0) < 0) {
 316                 ssb_printk(KERN_ERR "PCI: SSB bridge enable failed\n");
 317                 return;
 318         }
 319
 320         /* Enable PCI bridge BAR1 prefetch and burst */
 321         pci_write_config_dword(dev, SSB_BAR1_CONTROL, 3);
 322
 323         /* Make sure our latency is high enough to handle the devices behind us */
 324         lat = 168;
 325         ssb_printk(KERN_INFO "PCI: Fixing latency timer of device %s to %u\n",
 326                    pci_name(dev), lat);
 327         pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
 328 }
 329 DECLARE_PCI_FIXUP_EARLY(PCI_ANY_ID, PCI_ANY_ID, ssb_pcicore_fixup_pcibridge);
 330
 331 /* PCI device IRQ mapping. */
 332 int ssb_pcicore_pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 333 {
 334         if (dev->bus->ops != &ssb_pcicore_pciops) {
 335                 /* This is not a device on the PCI-core bridge. */
 336                 return -ENODEV;
 337         }
 338         return ssb_mips_irq(extpci_core->dev) + 2;
 339 }
 340
 341 static void ssb_pcicore_init_hostmode(struct ssb_pcicore *pc)
 342 {
 343         u32 val;
 344
 345         if (WARN_ON(extpci_core))
 346                 return;
 347         extpci_core = pc;
 348
 349         ssb_dprintk(KERN_INFO PFX "PCIcore in host mode found\n");
 350         /* Reset devices on the external PCI bus */
 351         val = SSB_PCICORE_CTL_RST_OE;
 352         val |= SSB_PCICORE_CTL_CLK_OE;
 353         pcicore_write32(pc, SSB_PCICORE_CTL, val);
 354         val |= SSB_PCICORE_CTL_CLK; /* Clock on */
 355         pcicore_write32(pc, SSB_PCICORE_CTL, val);
 356         udelay(150); /* Assertion time demanded by the PCI standard */
 357         val |= SSB_PCICORE_CTL_RST; /* Deassert RST# */
 358         pcicore_write32(pc, SSB_PCICORE_CTL, val);
 359         val = SSB_PCICORE_ARBCTL_INTERN;
 360         pcicore_write32(pc, SSB_PCICORE_ARBCTL, val);
 361         udelay(1); /* Assertion time demanded by the PCI standard */
 362
 363         if (pc->dev->bus->has_cardbus_slot) {
 364                 ssb_dprintk(KERN_INFO PFX "CardBus slot detected\n");
 365                 pc->cardbusmode = 1;
 366                 /* GPIO 1 resets the bridge */
 367                 ssb_gpio_out(pc->dev->bus, 1, 1);
 368                 ssb_gpio_outen(pc->dev->bus, 1, 1);
 369                 pcicore_write16(pc, SSB_PCICORE_SPROM(0),
 370                                 pcicore_read16(pc, SSB_PCICORE_SPROM(0))
 371                                 | 0x0400);
 372         }
 373
 374         /* 64MB I/O window */
 375         pcicore_write32(pc, SSB_PCICORE_SBTOPCI0,
 376                         SSB_PCICORE_SBTOPCI_IO);
 377         /* 64MB config space */
 378         pcicore_write32(pc, SSB_PCICORE_SBTOPCI1,
 379                         SSB_PCICORE_SBTOPCI_CFG0);
 380         /* 1GB memory window */
 381         pcicore_write32(pc, SSB_PCICORE_SBTOPCI2,
 382                         SSB_PCICORE_SBTOPCI_MEM | SSB_PCI_DMA);
 383
 384         /* Enable PCI bridge BAR0 prefetch and burst */
 385         val = PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
 386         ssb_extpci_write_config(pc, 0, 0, 0, PCI_COMMAND, &val, 2);
 387         /* Clear error conditions */
 388         val = 0;
 389         ssb_extpci_write_config(pc, 0, 0, 0, PCI_STATUS, &val, 2);
 390
 391         /* Enable PCI interrupts */
 392         pcicore_write32(pc, SSB_PCICORE_IMASK,
 393                         SSB_PCICORE_IMASK_INTA);
 394
 395         /* Ok, ready to run, register it to the system.
 396          * The following needs change, if we want to port hostmode
 397          * to non-MIPS platform. */
 398         ssb_pcicore_controller.io_map_base = (unsigned long)ioremap_nocache(SSB_PCI_MEM, 0x04000000);
 399         set_io_port_base(ssb_pcicore_controller.io_map_base);
 400         /* Give some time to the PCI controller to configure itself with the new
 401          * values. Not waiting at this point causes crashes of the machine. */
 402         mdelay(10);
 403         register_pci_controller(&ssb_pcicore_controller);
 404 }
 405
 406 static int pcicore_is_in_hostmode(struct ssb_pcicore *pc)
 407 {
 408         struct ssb_bus *bus = pc->dev->bus;
 409         u16 chipid_top;
 410         u32 tmp;
 411
 412         chipid_top = (bus->chip_id & 0xFF00);
 413         if (chipid_top != 0x4700 &&
 414             chipid_top != 0x5300)
 415                 return 0;
 416
 417         if (bus->sprom.boardflags_lo & SSB_PCICORE_BFL_NOPCI)
 418                 return 0;
 419
 420         /* The 200-pin BCM4712 package does not bond out PCI. Even when
 421          * PCI is bonded out, some boards may leave the pins floating. */
 422         if (bus->chip_id == 0x4712) {
 423                 if (bus->chip_package == SSB_CHIPPACK_BCM4712S)
 424                         return 0;
 425                 if (bus->chip_package == SSB_CHIPPACK_BCM4712M)
 426                         return 0;
 427         }
 428         if (bus->chip_id == 0x5350)
 429                 return 0;
 430
 431         return !mips_busprobe32(tmp, (bus->mmio + (pc->dev->core_index * SSB_CORE_SIZE)));
 432 }
 433 #endif /* CONFIG_SSB_PCICORE_HOSTMODE */
 434
 435
 436 /**************************************************
 437  * Generic and Clientmode operation code.
 438  **************************************************/
 439
 440 static void ssb_pcicore_init_clientmode(struct ssb_pcicore *pc)
 441 {
 442         /* Disable PCI interrupts. */
 443         ssb_write32(pc->dev, SSB_INTVEC, 0);
 444 }
 445
 446 void ssb_pcicore_init(struct ssb_pcicore *pc)
 447 {
 448         struct ssb_device *dev = pc->dev;
 449         struct ssb_bus *bus;
 450
 451         if (!dev)
 452                 return;
 453         bus = dev->bus;
 454         if (!ssb_device_is_enabled(dev))
 455                 ssb_device_enable(dev, 0);
 456
 457 #ifdef CONFIG_SSB_PCICORE_HOSTMODE
 458         pc->hostmode = pcicore_is_in_hostmode(pc);
 459         if (pc->hostmode)
 460                 ssb_pcicore_init_hostmode(pc);
 461 #endif /* CONFIG_SSB_PCICORE_HOSTMODE */
 462         if (!pc->hostmode)
 463                 ssb_pcicore_init_clientmode(pc);
 464 }
 465
 466 static u32 ssb_pcie_read(struct ssb_pcicore *pc, u32 address)
 467 {
 468         pcicore_write32(pc, 0x130, address);
 469         return pcicore_read32(pc, 0x134);
 470 }
 471
 472 static void ssb_pcie_write(struct ssb_pcicore *pc, u32 address, u32 data)
 473 {
 474         pcicore_write32(pc, 0x130, address);
 475         pcicore_write32(pc, 0x134, data);
 476 }
 477
 478 static void ssb_pcie_mdio_write(struct ssb_pcicore *pc, u8 device,
 479                                 u8 address, u16 data)
 480 {
 481         const u16 mdio_control = 0x128;
 482         const u16 mdio_data = 0x12C;
 483         u32 v;
 484         int i;
 485
 486         v = 0x80; /* Enable Preamble Sequence */
 487         v |= 0x2; /* MDIO Clock Divisor */
 488         pcicore_write32(pc, mdio_control, v);
 489
 490         v = (1 << 30); /* Start of Transaction */
 491         v |= (1 << 28); /* Write Transaction */
 492         v |= (1 << 17); /* Turnaround */
 493         v |= (u32)device << 22;
 494         v |= (u32)address << 18;
 495         v |= data;
 496         pcicore_write32(pc, mdio_data, v);
 497         /* Wait for the device to complete the transaction */
 498         udelay(10);
 499         for (i = 0; i < 10; i++) {
 500                 v = pcicore_read32(pc, mdio_control);
 501                 if (v & 0x100 /* Trans complete */)
 502                         break;
 503                 msleep(1);
 504         }
 505         pcicore_write32(pc, mdio_control, 0);
 506 }
 507
 508 static void ssb_broadcast_value(struct ssb_device *dev,
 509                                 u32 address, u32 data)
 510 {
 511         /* This is used for both, PCI and ChipCommon core, so be careful. */
 512         BUILD_BUG_ON(SSB_PCICORE_BCAST_ADDR != SSB_CHIPCO_BCAST_ADDR);
 513         BUILD_BUG_ON(SSB_PCICORE_BCAST_DATA != SSB_CHIPCO_BCAST_DATA);
 514
 515         ssb_write32(dev, SSB_PCICORE_BCAST_ADDR, address);
 516         ssb_read32(dev, SSB_PCICORE_BCAST_ADDR); /* flush */
 517         ssb_write32(dev, SSB_PCICORE_BCAST_DATA, data);
 518         ssb_read32(dev, SSB_PCICORE_BCAST_DATA); /* flush */
 519 }
 520
 521 static void ssb_commit_settings(struct ssb_bus *bus)
 522 {
 523         struct ssb_device *dev;
 524
 525         dev = bus->chipco.dev ? bus->chipco.dev : bus->pcicore.dev;
 526         if (WARN_ON(!dev))
 527                 return;
 528         /* This forces an update of the cached registers. */
 529         ssb_broadcast_value(dev, 0xFD8, 0);
 530 }
 531
 532 int ssb_pcicore_dev_irqvecs_enable(struct ssb_pcicore *pc,
 533                                    struct ssb_device *dev)
 534 {
 535         struct ssb_device *pdev = pc->dev;
 536         struct ssb_bus *bus;
 537         int err = 0;
 538         u32 tmp;
 539
 540         if (dev->bus->bustype != SSB_BUSTYPE_PCI) {
 541                 /* This SSB device is not on a PCI host-bus. So the IRQs are
 542                  * not routed through the PCI core.
 543                  * So we must not enable routing through the PCI core. */
 544                 goto out;
 545         }
 546
 547         if (!pdev)
 548                 goto out;
 549         bus = pdev->bus;
 550
 551         might_sleep_if(pdev->id.coreid != SSB_DEV_PCI);
 552
 553         /* Enable interrupts for this device. */
 554         if ((pdev->id.revision >= 6) || (pdev->id.coreid == SSB_DEV_PCIE)) {
 555                 u32 coremask;
 556
 557                 /* Calculate the "coremask" for the device. */
 558                 coremask = (1 << dev->core_index);
 559
 560                 SSB_WARN_ON(bus->bustype != SSB_BUSTYPE_PCI);
 561                 err = pci_read_config_dword(bus->host_pci, SSB_PCI_IRQMASK, &tmp);
 562                 if (err)
 563                         goto out;
 564                 tmp |= coremask << 8;
 565                 err = pci_write_config_dword(bus->host_pci, SSB_PCI_IRQMASK, tmp);
 566                 if (err)
 567                         goto out;
 568         } else {
 569                 u32 intvec;
 570
 571                 intvec = ssb_read32(pdev, SSB_INTVEC);
 572                 tmp = ssb_read32(dev, SSB_TPSFLAG);
 573                 tmp &= SSB_TPSFLAG_BPFLAG;
 574                 intvec |= (1 << tmp);
 575                 ssb_write32(pdev, SSB_INTVEC, intvec);
 576         }
 577
 578         /* Setup PCIcore operation. */
 579         if (pc->setup_done)
 580                 goto out;
 581         if (pdev->id.coreid == SSB_DEV_PCI) {
 582                 tmp = pcicore_read32(pc, SSB_PCICORE_SBTOPCI2);
 583                 tmp |= SSB_PCICORE_SBTOPCI_PREF;
 584                 tmp |= SSB_PCICORE_SBTOPCI_BURST;
 585                 pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, tmp);
 586
 587                 if (pdev->id.revision < 5) {
 588                         tmp = ssb_read32(pdev, SSB_IMCFGLO);
 589                         tmp &= ~SSB_IMCFGLO_SERTO;
 590                         tmp |= 2;
 591                         tmp &= ~SSB_IMCFGLO_REQTO;
 592                         tmp |= 3 << SSB_IMCFGLO_REQTO_SHIFT;
 593                         ssb_write32(pdev, SSB_IMCFGLO, tmp);
 594                         ssb_commit_settings(bus);
 595                 } else if (pdev->id.revision >= 11) {
 596                         tmp = pcicore_read32(pc, SSB_PCICORE_SBTOPCI2);
 597                         tmp |= SSB_PCICORE_SBTOPCI_MRM;
 598                         pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, tmp);
 599                 }
 600         } else {
 601                 WARN_ON(pdev->id.coreid != SSB_DEV_PCIE);
 602                 //TODO: Better make defines for all these magic PCIE values.
 603                 if ((pdev->id.revision == 0) || (pdev->id.revision == 1)) {
 604                         /* TLP Workaround register. */
 605                         tmp = ssb_pcie_read(pc, 0x4);
 606                         tmp |= 0x8;
 607                         ssb_pcie_write(pc, 0x4, tmp);
 608                 }
 609                 if (pdev->id.revision == 0) {
 610                         const u8 serdes_rx_device = 0x1F;
 611
 612                         ssb_pcie_mdio_write(pc, serdes_rx_device,
 613                                             2 /* Timer */, 0x8128);
 614                         ssb_pcie_mdio_write(pc, serdes_rx_device,
 615                                             6 /* CDR */, 0x0100);
 616                         ssb_pcie_mdio_write(pc, serdes_rx_device,
 617                                             7 /* CDR BW */, 0x1466);
 618                 } else if (pdev->id.revision == 1) {
 619                         /* DLLP Link Control register. */
 620                         tmp = ssb_pcie_read(pc, 0x100);
 621                         tmp |= 0x40;
 622                         ssb_pcie_write(pc, 0x100, tmp);
 623                 }
 624         }
 625         pc->setup_done = 1;
 626 out:
 627         return err;
 628 }
 629 EXPORT_SYMBOL(ssb_pcicore_dev_irqvecs_enable);