target/linux/brcm47xx-2.6/files/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 <asm/io.h>
  19
  20 #include "ssb_private.h"
  21
  22
  23 const char * ssb_core_name(u16 coreid)
  24 {
  25         switch (coreid) {
  26         case SSB_DEV_CHIPCOMMON:
  27                 return "ChipCommon";
  28         case SSB_DEV_ILINE20:
  29                 return "ILine 20";
  30         case SSB_DEV_SDRAM:
  31                 return "SDRAM";
  32         case SSB_DEV_PCI:
  33                 return "PCI";
  34         case SSB_DEV_MIPS:
  35                 return "MIPS";
  36         case SSB_DEV_ETHERNET:
  37                 return "Fast Ethernet";
  38         case SSB_DEV_V90:
  39                 return "V90";
  40         case SSB_DEV_USB11_HOSTDEV:
  41                 return "USB 1.1 Hostdev";
  42         case SSB_DEV_ADSL:
  43                 return "ADSL";
  44         case SSB_DEV_ILINE100:
  45                 return "ILine 100";
  46         case SSB_DEV_IPSEC:
  47                 return "IPSEC";
  48         case SSB_DEV_PCMCIA:
  49                 return "PCMCIA";
  50         case SSB_DEV_INTERNAL_MEM:
  51                 return "Internal Memory";
  52         case SSB_DEV_MEMC_SDRAM:
  53                 return "MEMC SDRAM";
  54         case SSB_DEV_EXTIF:
  55                 return "EXTIF";
  56         case SSB_DEV_80211:
  57                 return "IEEE 802.11";
  58         case SSB_DEV_MIPS_3302:
  59                 return "MIPS 3302";
  60         case SSB_DEV_USB11_HOST:
  61                 return "USB 1.1 Host";
  62         case SSB_DEV_USB11_DEV:
  63                 return "USB 1.1 Device";
  64         case SSB_DEV_USB20_HOST:
  65                 return "USB 2.0 Host";
  66         case SSB_DEV_USB20_DEV:
  67                 return "USB 2.0 Device";
  68         case SSB_DEV_SDIO_HOST:
  69                 return "SDIO Host";
  70         case SSB_DEV_ROBOSWITCH:
  71                 return "Roboswitch";
  72         case SSB_DEV_PARA_ATA:
  73                 return "PATA";
  74         case SSB_DEV_SATA_XORDMA:
  75                 return "SATA XOR-DMA";
  76         case SSB_DEV_ETHERNET_GBIT:
  77                 return "GBit Ethernet";
  78         case SSB_DEV_PCIE:
  79                 return "PCI-E";
  80         case SSB_DEV_MIMO_PHY:
  81                 return "MIMO PHY";
  82         case SSB_DEV_SRAM_CTRLR:
  83                 return "SRAM Controller";
  84         case SSB_DEV_MINI_MACPHY:
  85                 return "Mini MACPHY";
  86         case SSB_DEV_ARM_1176:
  87                 return "ARM 1176";
  88         case SSB_DEV_ARM_7TDMI:
  89                 return "ARM 7TDMI";
  90         }
  91         return "UNKNOWN";
  92 }
  93
  94 static u16 pcidev_to_chipid(struct pci_dev *pci_dev)
  95 {
  96         u16 chipid_fallback = 0;
  97
  98         switch (pci_dev->device) {
  99         case 0x4301:
 100                 chipid_fallback = 0x4301;
 101                 break;
 102         case 0x4305 ... 0x4307:
 103                 chipid_fallback = 0x4307;
 104                 break;
 105         case 0x4403:
 106                 chipid_fallback = 0x4402;
 107                 break;
 108         case 0x4610 ... 0x4615:
 109                 chipid_fallback = 0x4610;
 110                 break;
 111         case 0x4710 ... 0x4715:
 112                 chipid_fallback = 0x4710;
 113                 break;
 114         case 0x4320 ... 0x4325:
 115                 chipid_fallback = 0x4309;
 116                 break;
 117         case PCI_DEVICE_ID_BCM4401:
 118         case PCI_DEVICE_ID_BCM4401B0:
 119         case PCI_DEVICE_ID_BCM4401B1:
 120                 chipid_fallback = 0x4401;
 121                 break;
 122         default:
 123                 ssb_printk(KERN_ERR PFX
 124                            "PCI-ID not in fallback list\n");
 125         }
 126
 127         return chipid_fallback;
 128 }
 129
 130 static u8 chipid_to_nrcores(u16 chipid)
 131 {
 132         switch (chipid) {
 133         case 0x5365:
 134                 return 7;
 135         case 0x4306:
 136                 return 6;
 137         case 0x4310:
 138                 return 8;
 139         case 0x4307:
 140         case 0x4301:
 141                 return 5;
 142         case 0x4401:
 143         case 0x4402:
 144                 return 3;
 145         case 0x4710:
 146         case 0x4610:
 147         case 0x4704:
 148                 return 9;
 149         default:
 150                 ssb_printk(KERN_ERR PFX
 151                            "CHIPID not in nrcores fallback list\n");
 152         }
 153
 154         return 1;
 155 }
 156
 157 static u32 scan_read32(struct ssb_bus *bus, u8 current_coreidx,
 158                        u16 offset)
 159 {
 160         switch (bus->bustype) {
 161         case SSB_BUSTYPE_SSB:
 162                 offset += current_coreidx * SSB_CORE_SIZE;
 163                 break;
 164         case SSB_BUSTYPE_PCI:
 165                 break;
 166         case SSB_BUSTYPE_PCMCIA:
 167                 if (offset >= 0x800) {
 168                         ssb_pcmcia_switch_segment(bus, 1);
 169                         offset -= 0x800;
 170                 } else
 171                         ssb_pcmcia_switch_segment(bus, 0);
 172                 break;
 173         }
 174         return readl(bus->mmio + offset);
 175 }
 176
 177 static int scan_switchcore(struct ssb_bus *bus, u8 coreidx)
 178 {
 179         switch (bus->bustype) {
 180         case SSB_BUSTYPE_SSB:
 181                 break;
 182         case SSB_BUSTYPE_PCI:
 183                 return ssb_pci_switch_coreidx(bus, coreidx);
 184         case SSB_BUSTYPE_PCMCIA:
 185                 return ssb_pcmcia_switch_coreidx(bus, coreidx);
 186         }
 187         return 0;
 188 }
 189
 190 void ssb_iounmap(struct ssb_bus *bus)
 191 {
 192         switch (bus->bustype) {
 193         case SSB_BUSTYPE_SSB:
 194         case SSB_BUSTYPE_PCMCIA:
 195                 iounmap(bus->mmio);
 196                 break;
 197         case SSB_BUSTYPE_PCI:
 198                 pci_iounmap(bus->host_pci, bus->mmio);
 199                 break;
 200         }
 201         bus->mmio = NULL;
 202         bus->mapped_device = NULL;
 203 }
 204
 205 static void __iomem * ssb_ioremap(struct ssb_bus *bus,
 206                                   unsigned long baseaddr)
 207 {
 208         void __iomem *mmio = NULL;
 209
 210         switch (bus->bustype) {
 211         case SSB_BUSTYPE_SSB:
 212                 /* Only map the first core for now. */
 213                 /* fallthrough... */
 214         case SSB_BUSTYPE_PCMCIA:
 215                 mmio = ioremap(baseaddr, SSB_CORE_SIZE);
 216                 break;
 217         case SSB_BUSTYPE_PCI:
 218                 mmio = pci_iomap(bus->host_pci, 0, ~0UL);
 219                 break;
 220         }
 221
 222         return mmio;
 223 }
 224
 225 int ssb_bus_scan(struct ssb_bus *bus,
 226                  unsigned long baseaddr)
 227 {
 228         int err = -ENOMEM;
 229         void __iomem *mmio;
 230         u32 idhi, cc, rev, tmp;
 231         int i;
 232         struct ssb_device *dev;
 233
 234         mmio = ssb_ioremap(bus, baseaddr);
 235         if (!mmio)
 236                 goto out;
 237         bus->mmio = mmio;
 238
 239         err = scan_switchcore(bus, 0); /* Switch to first core */
 240         if (err)
 241                 goto err_unmap;
 242
 243         idhi = scan_read32(bus, 0, SSB_IDHIGH);
 244         cc = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT;
 245         rev = (idhi & SSB_IDHIGH_RCLO);
 246         rev |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT;
 247
 248         bus->nr_devices = 0;
 249         if (cc == SSB_DEV_CHIPCOMMON) {
 250                 tmp = scan_read32(bus, 0, SSB_CHIPCO_CHIPID);
 251
 252                 bus->chip_id = (tmp & SSB_CHIPCO_IDMASK);
 253                 bus->chip_rev = (tmp & SSB_CHIPCO_REVMASK) >>
 254                                 SSB_CHIPCO_REVSHIFT;
 255                 bus->chip_package = (tmp & SSB_CHIPCO_PACKMASK) >>
 256                                     SSB_CHIPCO_PACKSHIFT;
 257                 if (rev >= 4) {
 258                         bus->nr_devices = (tmp & SSB_CHIPCO_NRCORESMASK) >>
 259                                           SSB_CHIPCO_NRCORESSHIFT;
 260                 }
 261                 tmp = scan_read32(bus, 0, SSB_CHIPCO_CAP);
 262                 bus->chipco.capabilities = tmp;
 263         } else {
 264                 if (bus->bustype == SSB_BUSTYPE_PCI) {
 265                         bus->chip_id = pcidev_to_chipid(bus->host_pci);
 266                         pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
 267                                              &bus->chip_rev);
 268                         bus->chip_package = 0;
 269                 } else {
 270                         bus->chip_id = 0x4710;
 271                         bus->chip_rev = 0;
 272                         bus->chip_package = 0;
 273                 }
 274         }
 275         if (!bus->nr_devices)
 276                 bus->nr_devices = chipid_to_nrcores(bus->chip_id);
 277         if (bus->nr_devices > ARRAY_SIZE(bus->devices)) {
 278                 ssb_printk(KERN_ERR PFX
 279                            "More than %d ssb cores found (%d)\n",
 280                            SSB_MAX_NR_CORES, bus->nr_devices);
 281                 goto err_unmap;
 282         }
 283         if (bus->bustype == SSB_BUSTYPE_SSB) {
 284                 /* Now that we know the number of cores,
 285                  * remap the whole IO space for all cores.
 286                  */
 287                 err = -ENOMEM;
 288                 iounmap(mmio);
 289                 mmio = ioremap(baseaddr, SSB_CORE_SIZE * bus->nr_devices);
 290                 if (!mmio)
 291                         goto out;
 292                 bus->mmio = mmio;
 293         }
 294
 295         /* Fetch basic information about each core/device */
 296         for (i = 0; i < bus->nr_devices; i++) {
 297                 err = scan_switchcore(bus, i);
 298                 if (err)
 299                         goto err_unmap;
 300                 dev = &(bus->devices[i]);
 301
 302                 idhi = scan_read32(bus, i, SSB_IDHIGH);
 303                 dev->id.coreid = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT;
 304                 dev->id.revision = (idhi & SSB_IDHIGH_RCLO);
 305                 dev->id.revision |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT;
 306                 dev->id.vendor = (idhi & SSB_IDHIGH_VC) >> SSB_IDHIGH_VC_SHIFT;
 307                 dev->core_index = i;
 308                 dev->bus = bus;
 309                 if ((dev->bus->bustype == SSB_BUSTYPE_PCI) && (bus->host_pci))
 310                         dev->irq = bus->host_pci->irq;
 311
 312                 ssb_dprintk(KERN_INFO PFX
 313                             "Core %d found: %s "
 314                             "(cc 0x%03X, rev 0x%02X, vendor 0x%04X)\n",
 315                             i, ssb_core_name(dev->id.coreid),
 316                             dev->id.coreid, dev->id.revision, dev->id.vendor);
 317
 318                 dev->dev.bus = &ssb_bustype;
 319                 snprintf(dev->dev.bus_id, sizeof(dev->dev.bus_id),
 320                          "ssb%02x:%02x", bus->busnumber, i);
 321
 322                 switch (dev->id.coreid) {
 323                 case SSB_DEV_EXTIF:
 324 #ifdef CONFIG_BCM947XX
 325                         if (bus->extif.dev) {
 326                                 ssb_printk(KERN_WARNING PFX
 327                                            "WARNING: Multiple EXTIFs found\n");
 328                                 break;
 329                         }
 330                         bus->extif.dev = dev;
 331 #endif /* CONFIG_SSB_DRIVER_EXTIF */
 332                         break;
 333                 case SSB_DEV_CHIPCOMMON:
 334                         if (bus->chipco.dev) {
 335                                 ssb_printk(KERN_WARNING PFX
 336                                            "WARNING: Multiple ChipCommon found\n");
 337                                 break;
 338                         }
 339                         bus->chipco.dev = dev;
 340                         break;
 341                 case SSB_DEV_MIPS:
 342                 case SSB_DEV_MIPS_3302:
 343 #ifdef CONFIG_BCM947XX
 344                         if (bus->mipscore.dev) {
 345                                 ssb_printk(KERN_WARNING PFX
 346                                            "WARNING: Multiple MIPS cores found\n");
 347                                 break;
 348                         }
 349                         bus->mipscore.dev = dev;
 350 #endif /* CONFIG_BCM947XX */
 351                         break;
 352                 case SSB_DEV_PCI:
 353                 case SSB_DEV_PCIE:
 354 #ifdef CONFIG_SSB_DRIVER_PCICORE
 355                         if (bus->pcicore.dev) {
 356                                 ssb_printk(KERN_WARNING PFX
 357                                            "WARNING: Multiple PCI(E) cores found\n");
 358                                 break;
 359                         }
 360                         bus->pcicore.dev = dev;
 361 #endif /* CONFIG_SSB_DRIVER_PCICORE */
 362                         break;
 363                 default:
 364                         break;
 365                 }
 366         }
 367         err = 0;
 368 out:
 369         return err;
 370 err_unmap:
 371         ssb_iounmap(bus);
 372         goto out;
 373 }