linux/drivers/ssb/scan.c
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   1/*
   2 * Sonics Silicon Backplane
   3 * Bus scanning
   4 *
   5 * Copyright (C) 2005-2007 Michael Buesch <mb@bu3sch.de>
   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
  26const 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        }
  94        return "UNKNOWN";
  95}
  96
  97static u16 pcidev_to_chipid(struct pci_dev *pci_dev)
  98{
  99        u16 chipid_fallback = 0;
 100
 101        switch (pci_dev->device) {
 102        case 0x4301:
 103                chipid_fallback = 0x4301;
 104                break;
 105        case 0x4305 ... 0x4307:
 106                chipid_fallback = 0x4307;
 107                break;
 108        case 0x4403:
 109                chipid_fallback = 0x4402;
 110                break;
 111        case 0x4610 ... 0x4615:
 112                chipid_fallback = 0x4610;
 113                break;
 114        case 0x4710 ... 0x4715:
 115                chipid_fallback = 0x4710;
 116                break;
 117        case 0x4320 ... 0x4325:
 118                chipid_fallback = 0x4309;
 119                break;
 120        case PCI_DEVICE_ID_BCM4401:
 121        case PCI_DEVICE_ID_BCM4401B0:
 122        case PCI_DEVICE_ID_BCM4401B1:
 123                chipid_fallback = 0x4401;
 124                break;
 125        default:
 126                ssb_printk(KERN_ERR PFX
 127                           "PCI-ID not in fallback list\n");
 128        }
 129
 130        return chipid_fallback;
 131}
 132
 133static u8 chipid_to_nrcores(u16 chipid)
 134{
 135        switch (chipid) {
 136        case 0x5365:
 137                return 7;
 138        case 0x4306:
 139                return 6;
 140        case 0x4310:
 141                return 8;
 142        case 0x4307:
 143        case 0x4301:
 144                return 5;
 145        case 0x4401:
 146        case 0x4402:
 147                return 3;
 148        case 0x4710:
 149        case 0x4610:
 150        case 0x4704:
 151                return 9;
 152        default:
 153                ssb_printk(KERN_ERR PFX
 154                           "CHIPID not in nrcores fallback list\n");
 155        }
 156
 157        return 1;
 158}
 159
 160static u32 scan_read32(struct ssb_bus *bus, u8 current_coreidx,
 161                       u16 offset)
 162{
 163        u32 lo, hi;
 164
 165        switch (bus->bustype) {
 166        case SSB_BUSTYPE_SSB:
 167                offset += current_coreidx * SSB_CORE_SIZE;
 168                break;
 169        case SSB_BUSTYPE_PCI:
 170                break;
 171        case SSB_BUSTYPE_PCMCIA:
 172                if (offset >= 0x800) {
 173                        ssb_pcmcia_switch_segment(bus, 1);
 174                        offset -= 0x800;
 175                } else
 176                        ssb_pcmcia_switch_segment(bus, 0);
 177                lo = readw(bus->mmio + offset);
 178                hi = readw(bus->mmio + offset + 2);
 179                return lo | (hi << 16);
 180        case SSB_BUSTYPE_SDIO:
 181                offset += current_coreidx * SSB_CORE_SIZE;
 182                return ssb_sdio_scan_read32(bus, offset);
 183        }
 184        return readl(bus->mmio + offset);
 185}
 186
 187static int scan_switchcore(struct ssb_bus *bus, u8 coreidx)
 188{
 189        switch (bus->bustype) {
 190        case SSB_BUSTYPE_SSB:
 191                break;
 192        case SSB_BUSTYPE_PCI:
 193                return ssb_pci_switch_coreidx(bus, coreidx);
 194        case SSB_BUSTYPE_PCMCIA:
 195                return ssb_pcmcia_switch_coreidx(bus, coreidx);
 196        case SSB_BUSTYPE_SDIO:
 197                return ssb_sdio_scan_switch_coreidx(bus, coreidx);
 198        }
 199        return 0;
 200}
 201
 202void ssb_iounmap(struct ssb_bus *bus)
 203{
 204        switch (bus->bustype) {
 205        case SSB_BUSTYPE_SSB:
 206        case SSB_BUSTYPE_PCMCIA:
 207                iounmap(bus->mmio);
 208                break;
 209        case SSB_BUSTYPE_PCI:
 210#ifdef CONFIG_SSB_PCIHOST
 211                pci_iounmap(bus->host_pci, bus->mmio);
 212#else
 213                SSB_BUG_ON(1); /* Can't reach this code. */
 214#endif
 215                break;
 216        case SSB_BUSTYPE_SDIO:
 217                break;
 218        }
 219        bus->mmio = NULL;
 220        bus->mapped_device = NULL;
 221}
 222
 223static void __iomem *ssb_ioremap(struct ssb_bus *bus,
 224                                 unsigned long baseaddr)
 225{
 226        void __iomem *mmio = NULL;
 227
 228        switch (bus->bustype) {
 229        case SSB_BUSTYPE_SSB:
 230                /* Only map the first core for now. */
 231                /* fallthrough... */
 232        case SSB_BUSTYPE_PCMCIA:
 233                mmio = ioremap(baseaddr, SSB_CORE_SIZE);
 234                break;
 235        case SSB_BUSTYPE_PCI:
 236#ifdef CONFIG_SSB_PCIHOST
 237                mmio = pci_iomap(bus->host_pci, 0, ~0UL);
 238#else
 239                SSB_BUG_ON(1); /* Can't reach this code. */
 240#endif
 241                break;
 242        case SSB_BUSTYPE_SDIO:
 243                /* Nothing to ioremap in the SDIO case, just fake it */
 244                mmio = (void __iomem *)baseaddr;
 245                break;
 246        }
 247
 248        return mmio;
 249}
 250
 251static int we_support_multiple_80211_cores(struct ssb_bus *bus)
 252{
 253        /* More than one 802.11 core is only supported by special chips.
 254         * There are chips with two 802.11 cores, but with dangling
 255         * pins on the second core. Be careful and reject them here.
 256         */
 257
 258#ifdef CONFIG_SSB_PCIHOST
 259        if (bus->bustype == SSB_BUSTYPE_PCI) {
 260                if (bus->host_pci->vendor == PCI_VENDOR_ID_BROADCOM &&
 261                    bus->host_pci->device == 0x4324)
 262                        return 1;
 263        }
 264#endif /* CONFIG_SSB_PCIHOST */
 265        return 0;
 266}
 267
 268int ssb_bus_scan(struct ssb_bus *bus,
 269                 unsigned long baseaddr)
 270{
 271        int err = -ENOMEM;
 272        void __iomem *mmio;
 273        u32 idhi, cc, rev, tmp;
 274        int dev_i, i;
 275        struct ssb_device *dev;
 276        int nr_80211_cores = 0;
 277
 278        mmio = ssb_ioremap(bus, baseaddr);
 279        if (!mmio)
 280                goto out;
 281        bus->mmio = mmio;
 282
 283        err = scan_switchcore(bus, 0); /* Switch to first core */
 284        if (err)
 285                goto err_unmap;
 286
 287        idhi = scan_read32(bus, 0, SSB_IDHIGH);
 288        cc = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT;
 289        rev = (idhi & SSB_IDHIGH_RCLO);
 290        rev |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT;
 291
 292        bus->nr_devices = 0;
 293        if (cc == SSB_DEV_CHIPCOMMON) {
 294                tmp = scan_read32(bus, 0, SSB_CHIPCO_CHIPID);
 295
 296                bus->chip_id = (tmp & SSB_CHIPCO_IDMASK);
 297                bus->chip_rev = (tmp & SSB_CHIPCO_REVMASK) >>
 298                                SSB_CHIPCO_REVSHIFT;
 299                bus->chip_package = (tmp & SSB_CHIPCO_PACKMASK) >>
 300                                    SSB_CHIPCO_PACKSHIFT;
 301                if (rev >= 4) {
 302                        bus->nr_devices = (tmp & SSB_CHIPCO_NRCORESMASK) >>
 303                                          SSB_CHIPCO_NRCORESSHIFT;
 304                }
 305                tmp = scan_read32(bus, 0, SSB_CHIPCO_CAP);
 306                bus->chipco.capabilities = tmp;
 307        } else {
 308                if (bus->bustype == SSB_BUSTYPE_PCI) {
 309                        bus->chip_id = pcidev_to_chipid(bus->host_pci);
 310                        pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
 311                                             &bus->chip_rev);
 312                        bus->chip_package = 0;
 313                } else {
 314                        bus->chip_id = 0x4710;
 315                        bus->chip_rev = 0;
 316                        bus->chip_package = 0;
 317                }
 318        }
 319        if (!bus->nr_devices)
 320                bus->nr_devices = chipid_to_nrcores(bus->chip_id);
 321        if (bus->nr_devices > ARRAY_SIZE(bus->devices)) {
 322                ssb_printk(KERN_ERR PFX
 323                           "More than %d ssb cores found (%d)\n",
 324                           SSB_MAX_NR_CORES, bus->nr_devices);
 325                goto err_unmap;
 326        }
 327        if (bus->bustype == SSB_BUSTYPE_SSB) {
 328                /* Now that we know the number of cores,
 329                 * remap the whole IO space for all cores.
 330                 */
 331                err = -ENOMEM;
 332                iounmap(mmio);
 333                mmio = ioremap(baseaddr, SSB_CORE_SIZE * bus->nr_devices);
 334                if (!mmio)
 335                        goto out;
 336                bus->mmio = mmio;
 337        }
 338
 339        /* Fetch basic information about each core/device */
 340        for (i = 0, dev_i = 0; i < bus->nr_devices; i++) {
 341                err = scan_switchcore(bus, i);
 342                if (err)
 343                        goto err_unmap;
 344                dev = &(bus->devices[dev_i]);
 345
 346                idhi = scan_read32(bus, i, SSB_IDHIGH);
 347                dev->id.coreid = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT;
 348                dev->id.revision = (idhi & SSB_IDHIGH_RCLO);
 349                dev->id.revision |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT;
 350                dev->id.vendor = (idhi & SSB_IDHIGH_VC) >> SSB_IDHIGH_VC_SHIFT;
 351                dev->core_index = i;
 352                dev->bus = bus;
 353                dev->ops = bus->ops;
 354
 355                printk(KERN_DEBUG PFX
 356                            "Core %d found: %s "
 357                            "(cc 0x%03X, rev 0x%02X, vendor 0x%04X)\n",
 358                            i, ssb_core_name(dev->id.coreid),
 359                            dev->id.coreid, dev->id.revision, dev->id.vendor);
 360
 361                switch (dev->id.coreid) {
 362                case SSB_DEV_80211:
 363                        nr_80211_cores++;
 364                        if (nr_80211_cores > 1) {
 365                                if (!we_support_multiple_80211_cores(bus)) {
 366                                        ssb_dprintk(KERN_INFO PFX "Ignoring additional "
 367                                                    "802.11 core\n");
 368                                        continue;
 369                                }
 370                        }
 371                        break;
 372                case SSB_DEV_EXTIF:
 373#ifdef CONFIG_SSB_DRIVER_EXTIF
 374                        if (bus->extif.dev) {
 375                                ssb_printk(KERN_WARNING PFX
 376                                           "WARNING: Multiple EXTIFs found\n");
 377                                break;
 378                        }
 379                        bus->extif.dev = dev;
 380#endif /* CONFIG_SSB_DRIVER_EXTIF */
 381                        break;
 382                case SSB_DEV_CHIPCOMMON:
 383                        if (bus->chipco.dev) {
 384                                ssb_printk(KERN_WARNING PFX
 385                                           "WARNING: Multiple ChipCommon found\n");
 386                                break;
 387                        }
 388                        bus->chipco.dev = dev;
 389                        break;
 390                case SSB_DEV_MIPS:
 391                case SSB_DEV_MIPS_3302:
 392#ifdef CONFIG_SSB_DRIVER_MIPS
 393                        if (bus->mipscore.dev) {
 394                                ssb_printk(KERN_WARNING PFX
 395                                           "WARNING: Multiple MIPS cores found\n");
 396                                break;
 397                        }
 398                        bus->mipscore.dev = dev;
 399#endif /* CONFIG_SSB_DRIVER_MIPS */
 400                        break;
 401                case SSB_DEV_PCI:
 402                case SSB_DEV_PCIE:
 403#ifdef CONFIG_SSB_DRIVER_PCICORE
 404                        if (bus->bustype == SSB_BUSTYPE_PCI) {
 405                                /* Ignore PCI cores on PCI-E cards.
 406                                 * Ignore PCI-E cores on PCI cards. */
 407                                if (dev->id.coreid == SSB_DEV_PCI) {
 408                                        if (pci_is_pcie(bus->host_pci))
 409                                                continue;
 410                                } else {
 411                                        if (!pci_is_pcie(bus->host_pci))
 412                                                continue;
 413                                }
 414                        }
 415                        if (bus->pcicore.dev) {
 416                                ssb_printk(KERN_WARNING PFX
 417                                           "WARNING: Multiple PCI(E) cores found\n");
 418                                break;
 419                        }
 420                        bus->pcicore.dev = dev;
 421#endif /* CONFIG_SSB_DRIVER_PCICORE */
 422                        break;
 423                case SSB_DEV_ETHERNET:
 424                        if (bus->bustype == SSB_BUSTYPE_PCI) {
 425                                if (bus->host_pci->vendor == PCI_VENDOR_ID_BROADCOM &&
 426                                    (bus->host_pci->device & 0xFF00) == 0x4300) {
 427                                        /* This is a dangling ethernet core on a
 428                                         * wireless device. Ignore it. */
 429                                        continue;
 430                                }
 431                        }
 432                        break;
 433                default:
 434                        break;
 435                }
 436
 437                dev_i++;
 438        }
 439        bus->nr_devices = dev_i;
 440
 441        err = 0;
 442out:
 443        return err;
 444err_unmap:
 445        ssb_iounmap(bus);
 446        goto out;
 447}
 448