drivers/ssb/scan.c

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