drivers/ssb/scan.c

   1 /*
   2  * Sonics Silicon Backplane
   3  * Bus scanning
   4  *
   5  * Copyright (C) 2005-2007 Michael Buesch <m@bues.ch>
   6  * Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
   7  * Copyright (C) 2005 Stefano Brivio <st3@riseup.net>
   8  * Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
   9  * Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
  10  * Copyright (C) 2006 Broadcom Corporation.
  11  *
  12  * Licensed under the GNU/GPL. See COPYING for details.
  13  */
  14
  15 #include <linux/ssb/ssb.h>
  16 #include <linux/ssb/ssb_regs.h>
  17 #include <linux/pci.h>
  18 #include <linux/io.h>
  19
  20 #include <pcmcia/cistpl.h>
  21 #include <pcmcia/ds.h>
  22
  23 #include "ssb_private.h"
  24
  25
  26 const char *ssb_core_name(u16 coreid)
  27 {
  28         switch (coreid) {
  29         case SSB_DEV_CHIPCOMMON:
  30                 return "ChipCommon";
  31         case SSB_DEV_ILINE20:
  32                 return "ILine 20";
  33         case SSB_DEV_SDRAM:
  34                 return "SDRAM";
  35         case SSB_DEV_PCI:
  36                 return "PCI";
  37         case SSB_DEV_MIPS:
  38                 return "MIPS";
  39         case SSB_DEV_ETHERNET:
  40                 return "Fast Ethernet";
  41         case SSB_DEV_V90:
  42                 return "V90";
  43         case SSB_DEV_USB11_HOSTDEV:
  44                 return "USB 1.1 Hostdev";
  45         case SSB_DEV_ADSL:
  46                 return "ADSL";
  47         case SSB_DEV_ILINE100:
  48                 return "ILine 100";
  49         case SSB_DEV_IPSEC:
  50                 return "IPSEC";
  51         case SSB_DEV_PCMCIA:
  52                 return "PCMCIA";
  53         case SSB_DEV_INTERNAL_MEM:
  54                 return "Internal Memory";
  55         case SSB_DEV_MEMC_SDRAM:
  56                 return "MEMC SDRAM";
  57         case SSB_DEV_EXTIF:
  58                 return "EXTIF";
  59         case SSB_DEV_80211:
  60                 return "IEEE 802.11";
  61         case SSB_DEV_MIPS_3302:
  62                 return "MIPS 3302";
  63         case SSB_DEV_USB11_HOST:
  64                 return "USB 1.1 Host";
  65         case SSB_DEV_USB11_DEV:
  66                 return "USB 1.1 Device";
  67         case SSB_DEV_USB20_HOST:
  68                 return "USB 2.0 Host";
  69         case SSB_DEV_USB20_DEV:
  70                 return "USB 2.0 Device";
  71         case SSB_DEV_SDIO_HOST:
  72                 return "SDIO Host";
  73         case SSB_DEV_ROBOSWITCH:
  74                 return "Roboswitch";
  75         case SSB_DEV_PARA_ATA:
  76                 return "PATA";
  77         case SSB_DEV_SATA_XORDMA:
  78                 return "SATA XOR-DMA";
  79         case SSB_DEV_ETHERNET_GBIT:
  80                 return "GBit Ethernet";
  81         case SSB_DEV_PCIE:
  82                 return "PCI-E";
  83         case SSB_DEV_MIMO_PHY:
  84                 return "MIMO PHY";
  85         case SSB_DEV_SRAM_CTRLR:
  86                 return "SRAM Controller";
  87         case SSB_DEV_MINI_MACPHY:
  88                 return "Mini MACPHY";
  89         case SSB_DEV_ARM_1176:
  90                 return "ARM 1176";
  91         case SSB_DEV_ARM_7TDMI:
  92                 return "ARM 7TDMI";
  93         case SSB_DEV_ARM_CM3:
  94                 return "ARM Cortex M3";
  95         }
  96         return "UNKNOWN";
  97 }
  98
  99 static u16 pcidev_to_chipid(struct pci_dev *pci_dev)
 100 {
 101         u16 chipid_fallback = 0;
 102
 103         switch (pci_dev->device) {
 104         case 0x4301:
 105                 chipid_fallback = 0x4301;
 106                 break;
 107         case 0x4305 ... 0x4307:
 108                 chipid_fallback = 0x4307;
 109                 break;
 110         case 0x4403:
 111                 chipid_fallback = 0x4402;
 112                 break;
 113         case 0x4610 ... 0x4615:
 114                 chipid_fallback = 0x4610;
 115                 break;
 116         case 0x4710 ... 0x4715:
 117                 chipid_fallback = 0x4710;
 118                 break;
 119         case 0x4320 ... 0x4325:
 120                 chipid_fallback = 0x4309;
 121                 break;
 122         case PCI_DEVICE_ID_BCM4401:
 123         case PCI_DEVICE_ID_BCM4401B0:
 124         case PCI_DEVICE_ID_BCM4401B1:
 125                 chipid_fallback = 0x4401;
 126                 break;
 127         default:
 128                 ssb_printk(KERN_ERR PFX
 129                            "PCI-ID not in fallback list\n");
 130         }
 131
 132         return chipid_fallback;
 133 }
 134
 135 static u8 chipid_to_nrcores(u16 chipid)
 136 {
 137         switch (chipid) {
 138         case 0x5365:
 139                 return 7;
 140         case 0x4306:
 141                 return 6;
 142         case 0x4310:
 143                 return 8;
 144         case 0x4307:
 145         case 0x4301:
 146                 return 5;
 147         case 0x4401:
 148         case 0x4402:
 149                 return 3;
 150         case 0x4710:
 151         case 0x4610:
 152         case 0x4704:
 153                 return 9;
 154         default:
 155                 ssb_printk(KERN_ERR PFX
 156                            "CHIPID not in nrcores fallback list\n");
 157         }
 158
 159         return 1;
 160 }
 161
 162 static u32 scan_read32(struct ssb_bus *bus, u8 current_coreidx,
 163                        u16 offset)
 164 {
 165         u32 lo, hi;
 166
 167         switch (bus->bustype) {
 168         case SSB_BUSTYPE_SSB:
 169                 offset += current_coreidx * SSB_CORE_SIZE;
 170                 break;
 171         case SSB_BUSTYPE_PCI:
 172                 break;
 173         case SSB_BUSTYPE_PCMCIA:
 174                 if (offset >= 0x800) {
 175                         ssb_pcmcia_switch_segment(bus, 1);
 176                         offset -= 0x800;
 177                 } else
 178                         ssb_pcmcia_switch_segment(bus, 0);
 179                 lo = readw(bus->mmio + offset);
 180                 hi = readw(bus->mmio + offset + 2);
 181                 return lo | (hi << 16);
 182         case SSB_BUSTYPE_SDIO:
 183                 offset += current_coreidx * SSB_CORE_SIZE;
 184                 return ssb_sdio_scan_read32(bus, offset);
 185         }
 186         return readl(bus->mmio + offset);
 187 }
 188
 189 static int scan_switchcore(struct ssb_bus *bus, u8 coreidx)
 190 {
 191         switch (bus->bustype) {
 192         case SSB_BUSTYPE_SSB:
 193                 break;
 194         case SSB_BUSTYPE_PCI:
 195                 return ssb_pci_switch_coreidx(bus, coreidx);
 196         case SSB_BUSTYPE_PCMCIA:
 197                 return ssb_pcmcia_switch_coreidx(bus, coreidx);
 198         case SSB_BUSTYPE_SDIO:
 199                 return ssb_sdio_scan_switch_coreidx(bus, coreidx);
 200         }
 201         return 0;
 202 }
 203
 204 void ssb_iounmap(struct ssb_bus *bus)
 205 {
 206         switch (bus->bustype) {
 207         case SSB_BUSTYPE_SSB:
 208         case SSB_BUSTYPE_PCMCIA:
 209                 iounmap(bus->mmio);
 210                 break;
 211         case SSB_BUSTYPE_PCI:
 212 #ifdef CONFIG_SSB_PCIHOST
 213                 pci_iounmap(bus->host_pci, bus->mmio);
 214 #else
 215                 SSB_BUG_ON(1); /* Can't reach this code. */
 216 #endif
 217                 break;
 218         case SSB_BUSTYPE_SDIO:
 219                 break;
 220         }
 221         bus->mmio = NULL;
 222         bus->mapped_device = NULL;
 223 }
 224
 225 static void __iomem *ssb_ioremap(struct ssb_bus *bus,
 226                                  unsigned long baseaddr)
 227 {
 228         void __iomem *mmio = NULL;
 229
 230         switch (bus->bustype) {
 231         case SSB_BUSTYPE_SSB:
 232                 /* Only map the first core for now. */
 233                 /* fallthrough... */
 234         case SSB_BUSTYPE_PCMCIA:
 235                 mmio = ioremap(baseaddr, SSB_CORE_SIZE);
 236                 break;
 237         case SSB_BUSTYPE_PCI:
 238 #ifdef CONFIG_SSB_PCIHOST
 239                 mmio = pci_iomap(bus->host_pci, 0, ~0UL);
 240 #else
 241                 SSB_BUG_ON(1); /* Can't reach this code. */
 242 #endif
 243                 break;
 244         case SSB_BUSTYPE_SDIO:
 245                 /* Nothing to ioremap in the SDIO case, just fake it */
 246                 mmio = (void __iomem *)baseaddr;
 247                 break;
 248         }
 249
 250         return mmio;
 251 }
 252
 253 static int we_support_multiple_80211_cores(struct ssb_bus *bus)
 254 {
 255         /* More than one 802.11 core is only supported by special chips.
 256          * There are chips with two 802.11 cores, but with dangling
 257          * pins on the second core. Be careful and reject them here.
 258          */
 259
 260 #ifdef CONFIG_SSB_PCIHOST
 261         if (bus->bustype == SSB_BUSTYPE_PCI) {
 262                 if (bus->host_pci->vendor == PCI_VENDOR_ID_BROADCOM &&
 263                     ((bus->host_pci->device == 0x4313) ||
 264                      (bus->host_pci->device == 0x431A) ||
 265                      (bus->host_pci->device == 0x4321) ||
 266                      (bus->host_pci->device == 0x4324)))
 267                         return 1;
 268         }
 269 #endif /* CONFIG_SSB_PCIHOST */
 270         return 0;
 271 }
 272
 273 int ssb_bus_scan(struct ssb_bus *bus,
 274                  unsigned long baseaddr)
 275 {
 276         int err = -ENOMEM;
 277         void __iomem *mmio;
 278         u32 idhi, cc, rev, tmp;
 279         int dev_i, i;
 280         struct ssb_device *dev;
 281         int nr_80211_cores = 0;
 282
 283         mmio = ssb_ioremap(bus, baseaddr);
 284         if (!mmio)
 285                 goto out;
 286         bus->mmio = mmio;
 287
 288         err = scan_switchcore(bus, 0); /* Switch to first core */
 289         if (err)
 290                 goto err_unmap;
 291
 292         idhi = scan_read32(bus, 0, SSB_IDHIGH);
 293         cc = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT;
 294         rev = (idhi & SSB_IDHIGH_RCLO);
 295         rev |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT;
 296
 297         bus->nr_devices = 0;
 298         if (cc == SSB_DEV_CHIPCOMMON) {
 299                 tmp = scan_read32(bus, 0, SSB_CHIPCO_CHIPID);
 300
 301                 bus->chip_id = (tmp & SSB_CHIPCO_IDMASK);
 302                 bus->chip_rev = (tmp & SSB_CHIPCO_REVMASK) >>
 303                                 SSB_CHIPCO_REVSHIFT;
 304                 bus->chip_package = (tmp & SSB_CHIPCO_PACKMASK) >>
 305                                     SSB_CHIPCO_PACKSHIFT;
 306                 if (rev >= 4) {
 307                         bus->nr_devices = (tmp & SSB_CHIPCO_NRCORESMASK) >>
 308                                           SSB_CHIPCO_NRCORESSHIFT;
 309                 }
 310                 tmp = scan_read32(bus, 0, SSB_CHIPCO_CAP);
 311                 bus->chipco.capabilities = tmp;
 312         } else {
 313                 if (bus->bustype == SSB_BUSTYPE_PCI) {
 314                         bus->chip_id = pcidev_to_chipid(bus->host_pci);
 315                         bus->chip_rev = bus->host_pci->revision;
 316                         bus->chip_package = 0;
 317                 } else {
 318                         bus->chip_id = 0x4710;
 319                         bus->chip_rev = 0;
 320                         bus->chip_package = 0;
 321                 }
 322         }
 323         ssb_printk(KERN_INFO PFX "Found chip with id 0x%04X, rev 0x%02X and "
 324                    "package 0x%02X\n", bus->chip_id, bus->chip_rev,
 325                    bus->chip_package);
 326         if (!bus->nr_devices)
 327                 bus->nr_devices = chipid_to_nrcores(bus->chip_id);
 328         if (bus->nr_devices > ARRAY_SIZE(bus->devices)) {
 329                 ssb_printk(KERN_ERR PFX
 330                            "More than %d ssb cores found (%d)\n",
 331                            SSB_MAX_NR_CORES, bus->nr_devices);
 332                 goto err_unmap;
 333         }
 334         if (bus->bustype == SSB_BUSTYPE_SSB) {
 335                 /* Now that we know the number of cores,
 336                  * remap the whole IO space for all cores.
 337                  */
 338                 err = -ENOMEM;
 339                 iounmap(mmio);
 340                 mmio = ioremap(baseaddr, SSB_CORE_SIZE * bus->nr_devices);
 341                 if (!mmio)
 342                         goto out;
 343                 bus->mmio = mmio;
 344         }
 345
 346         /* Fetch basic information about each core/device */
 347         for (i = 0, dev_i = 0; i < bus->nr_devices; i++) {
 348                 err = scan_switchcore(bus, i);
 349                 if (err)
 350                         goto err_unmap;
 351                 dev = &(bus->devices[dev_i]);
 352
 353                 idhi = scan_read32(bus, i, SSB_IDHIGH);
 354                 dev->id.coreid = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT;
 355                 dev->id.revision = (idhi & SSB_IDHIGH_RCLO);
 356                 dev->id.revision |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT;
 357                 dev->id.vendor = (idhi & SSB_IDHIGH_VC) >> SSB_IDHIGH_VC_SHIFT;
 358                 dev->core_index = i;
 359                 dev->bus = bus;
 360                 dev->ops = bus->ops;
 361
 362                 printk(KERN_DEBUG PFX
 363                             "Core %d found: %s "
 364                             "(cc 0x%03X, rev 0x%02X, vendor 0x%04X)\n",
 365                             i, ssb_core_name(dev->id.coreid),
 366                             dev->id.coreid, dev->id.revision, dev->id.vendor);
 367
 368                 switch (dev->id.coreid) {
 369                 case SSB_DEV_80211:
 370                         nr_80211_cores++;
 371                         if (nr_80211_cores > 1) {
 372                                 if (!we_support_multiple_80211_cores(bus)) {
 373                                         ssb_dprintk(KERN_INFO PFX "Ignoring additional "
 374                                                     "802.11 core\n");
 375                                         continue;
 376                                 }
 377                         }
 378                         break;
 379                 case SSB_DEV_EXTIF:
 380 #ifdef CONFIG_SSB_DRIVER_EXTIF
 381                         if (bus->extif.dev) {
 382                                 ssb_printk(KERN_WARNING PFX
 383                                            "WARNING: Multiple EXTIFs found\n");
 384                                 break;
 385                         }
 386                         bus->extif.dev = dev;
 387 #endif /* CONFIG_SSB_DRIVER_EXTIF */
 388                         break;
 389                 case SSB_DEV_CHIPCOMMON:
 390                         if (bus->chipco.dev) {
 391                                 ssb_printk(KERN_WARNING PFX
 392                                            "WARNING: Multiple ChipCommon found\n");
 393                                 break;
 394                         }
 395                         bus->chipco.dev = dev;
 396                         break;
 397                 case SSB_DEV_MIPS:
 398                 case SSB_DEV_MIPS_3302:
 399 #ifdef CONFIG_SSB_DRIVER_MIPS
 400                         if (bus->mipscore.dev) {
 401                                 ssb_printk(KERN_WARNING PFX
 402                                            "WARNING: Multiple MIPS cores found\n");
 403                                 break;
 404                         }
 405                         bus->mipscore.dev = dev;
 406 #endif /* CONFIG_SSB_DRIVER_MIPS */
 407                         break;
 408                 case SSB_DEV_PCI:
 409                 case SSB_DEV_PCIE:
 410 #ifdef CONFIG_SSB_DRIVER_PCICORE
 411                         if (bus->bustype == SSB_BUSTYPE_PCI) {
 412                                 /* Ignore PCI cores on PCI-E cards.
 413                                  * Ignore PCI-E cores on PCI cards. */
 414                                 if (dev->id.coreid == SSB_DEV_PCI) {
 415                                         if (pci_is_pcie(bus->host_pci))
 416                                                 continue;
 417                                 } else {
 418                                         if (!pci_is_pcie(bus->host_pci))
 419                                                 continue;
 420                                 }
 421                         }
 422                         if (bus->pcicore.dev) {
 423                                 ssb_printk(KERN_WARNING PFX
 424                                            "WARNING: Multiple PCI(E) cores found\n");
 425                                 break;
 426                         }
 427                         bus->pcicore.dev = dev;
 428 #endif /* CONFIG_SSB_DRIVER_PCICORE */
 429                         break;
 430                 case SSB_DEV_ETHERNET:
 431                         if (bus->bustype == SSB_BUSTYPE_PCI) {
 432                                 if (bus->host_pci->vendor == PCI_VENDOR_ID_BROADCOM &&
 433                                     (bus->host_pci->device & 0xFF00) == 0x4300) {
 434                                         /* This is a dangling ethernet core on a
 435                                          * wireless device. Ignore it. */
 436                                         continue;
 437                                 }
 438                         }
 439                         break;
 440                 default:
 441                         break;
 442                 }
 443
 444                 dev_i++;
 445         }
 446         bus->nr_devices = dev_i;
 447
 448         err = 0;
 449 out:
 450         return err;
 451 err_unmap:
 452         ssb_iounmap(bus);
 453         goto out;
 454 }