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 <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
  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        case SSB_DEV_ARM_CM3:
  94                return "ARM Cortex M3";
  95        }
  96        return "UNKNOWN";
  97}
  98
  99static 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
 135static 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
 162static 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
 189static 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
 204void 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
 225static 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
 253static 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
 273int 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;
 449out:
 450        return err;
 451err_unmap:
 452        ssb_iounmap(bus);
 453        goto out;
 454}
 455
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