drivers/ssb/scan.c

   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/cs_types.h>
  21 #include <pcmcia/cs.h>
  22 #include <pcmcia/cistpl.h>
  23 #include <pcmcia/ds.h>
  24
  25 #include "ssb_private.h"
  26
  27
  28 const char *ssb_core_name(u16 coreid)
  29 {
  30         switch (coreid) {
  31         case SSB_DEV_CHIPCOMMON:
  32                 return "ChipCommon";
  33         case SSB_DEV_ILINE20:
  34                 return "ILine 20";
  35         case SSB_DEV_SDRAM:
  36                 return "SDRAM";
  37         case SSB_DEV_PCI:
  38                 return "PCI";
  39         case SSB_DEV_MIPS:
  40                 return "MIPS";
  41         case SSB_DEV_ETHERNET:
  42                 return "Fast Ethernet";
  43         case SSB_DEV_V90:
  44                 return "V90";
  45         case SSB_DEV_USB11_HOSTDEV:
  46                 return "USB 1.1 Hostdev";
  47         case SSB_DEV_ADSL:
  48                 return "ADSL";
  49         case SSB_DEV_ILINE100:
  50                 return "ILine 100";
  51         case SSB_DEV_IPSEC:
  52                 return "IPSEC";
  53         case SSB_DEV_PCMCIA:
  54                 return "PCMCIA";
  55         case SSB_DEV_INTERNAL_MEM:
  56                 return "Internal Memory";
  57         case SSB_DEV_MEMC_SDRAM:
  58                 return "MEMC SDRAM";
  59         case SSB_DEV_EXTIF:
  60                 return "EXTIF";
  61         case SSB_DEV_80211:
  62                 return "IEEE 802.11";
  63         case SSB_DEV_MIPS_3302:
  64                 return "MIPS 3302";
  65         case SSB_DEV_USB11_HOST:
  66                 return "USB 1.1 Host";
  67         case SSB_DEV_USB11_DEV:
  68                 return "USB 1.1 Device";
  69         case SSB_DEV_USB20_HOST:
  70                 return "USB 2.0 Host";
  71         case SSB_DEV_USB20_DEV:
  72                 return "USB 2.0 Device";
  73         case SSB_DEV_SDIO_HOST:
  74                 return "SDIO Host";
  75         case SSB_DEV_ROBOSWITCH:
  76                 return "Roboswitch";
  77         case SSB_DEV_PARA_ATA:
  78                 return "PATA";
  79         case SSB_DEV_SATA_XORDMA:
  80                 return "SATA XOR-DMA";
  81         case SSB_DEV_ETHERNET_GBIT:
  82                 return "GBit Ethernet";
  83         case SSB_DEV_PCIE:
  84                 return "PCI-E";
  85         case SSB_DEV_MIMO_PHY:
  86                 return "MIMO PHY";
  87         case SSB_DEV_SRAM_CTRLR:
  88                 return "SRAM Controller";
  89         case SSB_DEV_MINI_MACPHY:
  90                 return "Mini MACPHY";
  91         case SSB_DEV_ARM_1176:
  92                 return "ARM 1176";
  93         case SSB_DEV_ARM_7TDMI:
  94                 return "ARM 7TDMI";
  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         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                 break;
 178         }
 179         return readl(bus->mmio + offset);
 180 }
 181
 182 static int scan_switchcore(struct ssb_bus *bus, u8 coreidx)
 183 {
 184         switch (bus->bustype) {
 185         case SSB_BUSTYPE_SSB:
 186                 break;
 187         case SSB_BUSTYPE_PCI:
 188                 return ssb_pci_switch_coreidx(bus, coreidx);
 189         case SSB_BUSTYPE_PCMCIA:
 190                 return ssb_pcmcia_switch_coreidx(bus, coreidx);
 191         }
 192         return 0;
 193 }
 194
 195 void ssb_iounmap(struct ssb_bus *bus)
 196 {
 197         switch (bus->bustype) {
 198         case SSB_BUSTYPE_SSB:
 199         case SSB_BUSTYPE_PCMCIA:
 200                 iounmap(bus->mmio);
 201                 break;
 202         case SSB_BUSTYPE_PCI:
 203 #ifdef CONFIG_SSB_PCIHOST
 204                 pci_iounmap(bus->host_pci, bus->mmio);
 205 #else
 206                 SSB_BUG_ON(1); /* Can't reach this code. */
 207 #endif
 208                 break;
 209         }
 210         bus->mmio = NULL;
 211         bus->mapped_device = NULL;
 212 }
 213
 214 static void __iomem *ssb_ioremap(struct ssb_bus *bus,
 215                                  unsigned long baseaddr)
 216 {
 217         void __iomem *mmio = NULL;
 218
 219         switch (bus->bustype) {
 220         case SSB_BUSTYPE_SSB:
 221                 /* Only map the first core for now. */
 222                 /* fallthrough... */
 223         case SSB_BUSTYPE_PCMCIA:
 224                 mmio = ioremap(baseaddr, SSB_CORE_SIZE);
 225                 break;
 226         case SSB_BUSTYPE_PCI:
 227 #ifdef CONFIG_SSB_PCIHOST
 228                 mmio = pci_iomap(bus->host_pci, 0, ~0UL);
 229 #else
 230                 SSB_BUG_ON(1); /* Can't reach this code. */
 231 #endif
 232                 break;
 233         }
 234
 235         return mmio;
 236 }
 237
 238 static int we_support_multiple_80211_cores(struct ssb_bus *bus)
 239 {
 240         /* More than one 802.11 core is only supported by special chips.
 241          * There are chips with two 802.11 cores, but with dangling
 242          * pins on the second core. Be careful and reject them here.
 243          */
 244
 245 #ifdef CONFIG_SSB_PCIHOST
 246         if (bus->bustype == SSB_BUSTYPE_PCI) {
 247                 if (bus->host_pci->vendor == PCI_VENDOR_ID_BROADCOM &&
 248                     bus->host_pci->device == 0x4324)
 249                         return 1;
 250         }
 251 #endif /* CONFIG_SSB_PCIHOST */
 252         return 0;
 253 }
 254
 255 int ssb_bus_scan(struct ssb_bus *bus,
 256                  unsigned long baseaddr)
 257 {
 258         int err = -ENOMEM;
 259         void __iomem *mmio;
 260         u32 idhi, cc, rev, tmp;
 261         int dev_i, i;
 262         struct ssb_device *dev;
 263         int nr_80211_cores = 0;
 264
 265         mmio = ssb_ioremap(bus, baseaddr);
 266         if (!mmio)
 267                 goto out;
 268         bus->mmio = mmio;
 269
 270         err = scan_switchcore(bus, 0); /* Switch to first core */
 271         if (err)
 272                 goto err_unmap;
 273
 274         idhi = scan_read32(bus, 0, SSB_IDHIGH);
 275         cc = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT;
 276         rev = (idhi & SSB_IDHIGH_RCLO);
 277         rev |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT;
 278
 279         bus->nr_devices = 0;
 280         if (cc == SSB_DEV_CHIPCOMMON) {
 281                 tmp = scan_read32(bus, 0, SSB_CHIPCO_CHIPID);
 282
 283                 bus->chip_id = (tmp & SSB_CHIPCO_IDMASK);
 284                 bus->chip_rev = (tmp & SSB_CHIPCO_REVMASK) >>
 285                                 SSB_CHIPCO_REVSHIFT;
 286                 bus->chip_package = (tmp & SSB_CHIPCO_PACKMASK) >>
 287                                     SSB_CHIPCO_PACKSHIFT;
 288                 if (rev >= 4) {
 289                         bus->nr_devices = (tmp & SSB_CHIPCO_NRCORESMASK) >>
 290                                           SSB_CHIPCO_NRCORESSHIFT;
 291                 }
 292                 tmp = scan_read32(bus, 0, SSB_CHIPCO_CAP);
 293                 bus->chipco.capabilities = tmp;
 294         } else {
 295                 if (bus->bustype == SSB_BUSTYPE_PCI) {
 296                         bus->chip_id = pcidev_to_chipid(bus->host_pci);
 297                         pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
 298                                              &bus->chip_rev);
 299                         bus->chip_package = 0;
 300                 } else {
 301                         bus->chip_id = 0x4710;
 302                         bus->chip_rev = 0;
 303                         bus->chip_package = 0;
 304                 }
 305         }
 306         if (!bus->nr_devices)
 307                 bus->nr_devices = chipid_to_nrcores(bus->chip_id);
 308         if (bus->nr_devices > ARRAY_SIZE(bus->devices)) {
 309                 ssb_printk(KERN_ERR PFX
 310                            "More than %d ssb cores found (%d)\n",
 311                            SSB_MAX_NR_CORES, bus->nr_devices);
 312                 goto err_unmap;
 313         }
 314         if (bus->bustype == SSB_BUSTYPE_SSB) {
 315                 /* Now that we know the number of cores,
 316                  * remap the whole IO space for all cores.
 317                  */
 318                 err = -ENOMEM;
 319                 iounmap(mmio);
 320                 mmio = ioremap(baseaddr, SSB_CORE_SIZE * bus->nr_devices);
 321                 if (!mmio)
 322                         goto out;
 323                 bus->mmio = mmio;
 324         }
 325
 326         /* Fetch basic information about each core/device */
 327         for (i = 0, dev_i = 0; i < bus->nr_devices; i++) {
 328                 err = scan_switchcore(bus, i);
 329                 if (err)
 330                         goto err_unmap;
 331                 dev = &(bus->devices[dev_i]);
 332
 333                 idhi = scan_read32(bus, i, SSB_IDHIGH);
 334                 dev->id.coreid = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT;
 335                 dev->id.revision = (idhi & SSB_IDHIGH_RCLO);
 336                 dev->id.revision |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT;
 337                 dev->id.vendor = (idhi & SSB_IDHIGH_VC) >> SSB_IDHIGH_VC_SHIFT;
 338                 dev->core_index = i;
 339                 dev->bus = bus;
 340                 dev->ops = bus->ops;
 341
 342                 ssb_dprintk(KERN_INFO PFX
 343                             "Core %d found: %s "
 344                             "(cc 0x%03X, rev 0x%02X, vendor 0x%04X)\n",
 345                             i, ssb_core_name(dev->id.coreid),
 346                             dev->id.coreid, dev->id.revision, dev->id.vendor);
 347
 348                 switch (dev->id.coreid) {
 349                 case SSB_DEV_80211:
 350                         nr_80211_cores++;
 351                         if (nr_80211_cores > 1) {
 352                                 if (!we_support_multiple_80211_cores(bus)) {
 353                                         ssb_dprintk(KERN_INFO PFX "Ignoring additional "
 354                                                     "802.11 core\n");
 355                                         continue;
 356                                 }
 357                         }
 358                         break;
 359                 case SSB_DEV_EXTIF:
 360 #ifdef CONFIG_SSB_DRIVER_EXTIF
 361                         if (bus->extif.dev) {
 362                                 ssb_printk(KERN_WARNING PFX
 363                                            "WARNING: Multiple EXTIFs found\n");
 364                                 break;
 365                         }
 366                         bus->extif.dev = dev;
 367 #endif /* CONFIG_SSB_DRIVER_EXTIF */
 368                         break;
 369                 case SSB_DEV_CHIPCOMMON:
 370                         if (bus->chipco.dev) {
 371                                 ssb_printk(KERN_WARNING PFX
 372                                            "WARNING: Multiple ChipCommon found\n");
 373                                 break;
 374                         }
 375                         bus->chipco.dev = dev;
 376                         break;
 377                 case SSB_DEV_MIPS:
 378                 case SSB_DEV_MIPS_3302:
 379 #ifdef CONFIG_SSB_DRIVER_MIPS
 380                         if (bus->mipscore.dev) {
 381                                 ssb_printk(KERN_WARNING PFX
 382                                            "WARNING: Multiple MIPS cores found\n");
 383                                 break;
 384                         }
 385                         bus->mipscore.dev = dev;
 386 #endif /* CONFIG_SSB_DRIVER_MIPS */
 387                         break;
 388                 case SSB_DEV_PCI:
 389                 case SSB_DEV_PCIE:
 390 #ifdef CONFIG_SSB_DRIVER_PCICORE
 391                         if (bus->bustype == SSB_BUSTYPE_PCI) {
 392                                 /* Ignore PCI cores on PCI-E cards.
 393                                  * Ignore PCI-E cores on PCI cards. */
 394                                 if (dev->id.coreid == SSB_DEV_PCI) {
 395                                         if (bus->host_pci->is_pcie)
 396                                                 continue;
 397                                 } else {
 398                                         if (!bus->host_pci->is_pcie)
 399                                                 continue;
 400                                 }
 401                         }
 402                         if (bus->pcicore.dev) {
 403                                 ssb_printk(KERN_WARNING PFX
 404                                            "WARNING: Multiple PCI(E) cores found\n");
 405                                 break;
 406                         }
 407                         bus->pcicore.dev = dev;
 408 #endif /* CONFIG_SSB_DRIVER_PCICORE */
 409                         break;
 410                 default:
 411                         break;
 412                 }
 413
 414                 dev_i++;
 415         }
 416         bus->nr_devices = dev_i;
 417
 418         err = 0;
 419 out:
 420         return err;
 421 err_unmap:
 422         ssb_iounmap(bus);
 423         goto out;
 424 }