drivers/bcma/scan.c

   1 /*
   2  * Broadcom specific AMBA
   3  * Bus scanning
   4  *
   5  * Licensed under the GNU/GPL. See COPYING for details.
   6  */
   7
   8 #include "scan.h"
   9 #include "bcma_private.h"
  10
  11 #include <linux/bcma/bcma.h>
  12 #include <linux/bcma/bcma_regs.h>
  13 #include <linux/pci.h>
  14 #include <linux/io.h>
  15 #include <linux/dma-mapping.h>
  16 #include <linux/slab.h>
  17
  18 struct bcma_device_id_name {
  19         u16 id;
  20         const char *name;
  21 };
  22 struct bcma_device_id_name bcma_device_names[] = {
  23         { BCMA_CORE_OOB_ROUTER, "OOB Router" },
  24         { BCMA_CORE_INVALID, "Invalid" },
  25         { BCMA_CORE_CHIPCOMMON, "ChipCommon" },
  26         { BCMA_CORE_ILINE20, "ILine 20" },
  27         { BCMA_CORE_SRAM, "SRAM" },
  28         { BCMA_CORE_SDRAM, "SDRAM" },
  29         { BCMA_CORE_PCI, "PCI" },
  30         { BCMA_CORE_MIPS, "MIPS" },
  31         { BCMA_CORE_ETHERNET, "Fast Ethernet" },
  32         { BCMA_CORE_V90, "V90" },
  33         { BCMA_CORE_USB11_HOSTDEV, "USB 1.1 Hostdev" },
  34         { BCMA_CORE_ADSL, "ADSL" },
  35         { BCMA_CORE_ILINE100, "ILine 100" },
  36         { BCMA_CORE_IPSEC, "IPSEC" },
  37         { BCMA_CORE_UTOPIA, "UTOPIA" },
  38         { BCMA_CORE_PCMCIA, "PCMCIA" },
  39         { BCMA_CORE_INTERNAL_MEM, "Internal Memory" },
  40         { BCMA_CORE_MEMC_SDRAM, "MEMC SDRAM" },
  41         { BCMA_CORE_OFDM, "OFDM" },
  42         { BCMA_CORE_EXTIF, "EXTIF" },
  43         { BCMA_CORE_80211, "IEEE 802.11" },
  44         { BCMA_CORE_PHY_A, "PHY A" },
  45         { BCMA_CORE_PHY_B, "PHY B" },
  46         { BCMA_CORE_PHY_G, "PHY G" },
  47         { BCMA_CORE_MIPS_3302, "MIPS 3302" },
  48         { BCMA_CORE_USB11_HOST, "USB 1.1 Host" },
  49         { BCMA_CORE_USB11_DEV, "USB 1.1 Device" },
  50         { BCMA_CORE_USB20_HOST, "USB 2.0 Host" },
  51         { BCMA_CORE_USB20_DEV, "USB 2.0 Device" },
  52         { BCMA_CORE_SDIO_HOST, "SDIO Host" },
  53         { BCMA_CORE_ROBOSWITCH, "Roboswitch" },
  54         { BCMA_CORE_PARA_ATA, "PATA" },
  55         { BCMA_CORE_SATA_XORDMA, "SATA XOR-DMA" },
  56         { BCMA_CORE_ETHERNET_GBIT, "GBit Ethernet" },
  57         { BCMA_CORE_PCIE, "PCIe" },
  58         { BCMA_CORE_PHY_N, "PHY N" },
  59         { BCMA_CORE_SRAM_CTL, "SRAM Controller" },
  60         { BCMA_CORE_MINI_MACPHY, "Mini MACPHY" },
  61         { BCMA_CORE_ARM_1176, "ARM 1176" },
  62         { BCMA_CORE_ARM_7TDMI, "ARM 7TDMI" },
  63         { BCMA_CORE_PHY_LP, "PHY LP" },
  64         { BCMA_CORE_PMU, "PMU" },
  65         { BCMA_CORE_PHY_SSN, "PHY SSN" },
  66         { BCMA_CORE_SDIO_DEV, "SDIO Device" },
  67         { BCMA_CORE_ARM_CM3, "ARM CM3" },
  68         { BCMA_CORE_PHY_HT, "PHY HT" },
  69         { BCMA_CORE_MIPS_74K, "MIPS 74K" },
  70         { BCMA_CORE_MAC_GBIT, "GBit MAC" },
  71         { BCMA_CORE_DDR12_MEM_CTL, "DDR1/DDR2 Memory Controller" },
  72         { BCMA_CORE_PCIE_RC, "PCIe Root Complex" },
  73         { BCMA_CORE_OCP_OCP_BRIDGE, "OCP to OCP Bridge" },
  74         { BCMA_CORE_SHARED_COMMON, "Common Shared" },
  75         { BCMA_CORE_OCP_AHB_BRIDGE, "OCP to AHB Bridge" },
  76         { BCMA_CORE_SPI_HOST, "SPI Host" },
  77         { BCMA_CORE_I2S, "I2S" },
  78         { BCMA_CORE_SDR_DDR1_MEM_CTL, "SDR/DDR1 Memory Controller" },
  79         { BCMA_CORE_SHIM, "SHIM" },
  80         { BCMA_CORE_DEFAULT, "Default" },
  81 };
  82 const char *bcma_device_name(struct bcma_device_id *id)
  83 {
  84         int i;
  85
  86         if (id->manuf == BCMA_MANUF_BCM) {
  87                 for (i = 0; i < ARRAY_SIZE(bcma_device_names); i++) {
  88                         if (bcma_device_names[i].id == id->id)
  89                                 return bcma_device_names[i].name;
  90                 }
  91         }
  92         return "UNKNOWN";
  93 }
  94
  95 static u32 bcma_scan_read32(struct bcma_bus *bus, u8 current_coreidx,
  96                        u16 offset)
  97 {
  98         return readl(bus->mmio + offset);
  99 }
 100
 101 static void bcma_scan_switch_core(struct bcma_bus *bus, u32 addr)
 102 {
 103         if (bus->hosttype == BCMA_HOSTTYPE_PCI)
 104                 pci_write_config_dword(bus->host_pci, BCMA_PCI_BAR0_WIN,
 105                                        addr);
 106 }
 107
 108 static u32 bcma_erom_get_ent(struct bcma_bus *bus, u32 **eromptr)
 109 {
 110         u32 ent = readl(*eromptr);
 111         (*eromptr)++;
 112         return ent;
 113 }
 114
 115 static void bcma_erom_push_ent(u32 **eromptr)
 116 {
 117         (*eromptr)--;
 118 }
 119
 120 static s32 bcma_erom_get_ci(struct bcma_bus *bus, u32 **eromptr)
 121 {
 122         u32 ent = bcma_erom_get_ent(bus, eromptr);
 123         if (!(ent & SCAN_ER_VALID))
 124                 return -ENOENT;
 125         if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_CI)
 126                 return -ENOENT;
 127         return ent;
 128 }
 129
 130 static bool bcma_erom_is_end(struct bcma_bus *bus, u32 **eromptr)
 131 {
 132         u32 ent = bcma_erom_get_ent(bus, eromptr);
 133         bcma_erom_push_ent(eromptr);
 134         return (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID));
 135 }
 136
 137 static bool bcma_erom_is_bridge(struct bcma_bus *bus, u32 **eromptr)
 138 {
 139         u32 ent = bcma_erom_get_ent(bus, eromptr);
 140         bcma_erom_push_ent(eromptr);
 141         return (((ent & SCAN_ER_VALID)) &&
 142                 ((ent & SCAN_ER_TAGX) == SCAN_ER_TAG_ADDR) &&
 143                 ((ent & SCAN_ADDR_TYPE) == SCAN_ADDR_TYPE_BRIDGE));
 144 }
 145
 146 static void bcma_erom_skip_component(struct bcma_bus *bus, u32 **eromptr)
 147 {
 148         u32 ent;
 149         while (1) {
 150                 ent = bcma_erom_get_ent(bus, eromptr);
 151                 if ((ent & SCAN_ER_VALID) &&
 152                     ((ent & SCAN_ER_TAG) == SCAN_ER_TAG_CI))
 153                         break;
 154                 if (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID))
 155                         break;
 156         }
 157         bcma_erom_push_ent(eromptr);
 158 }
 159
 160 static s32 bcma_erom_get_mst_port(struct bcma_bus *bus, u32 **eromptr)
 161 {
 162         u32 ent = bcma_erom_get_ent(bus, eromptr);
 163         if (!(ent & SCAN_ER_VALID))
 164                 return -ENOENT;
 165         if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_MP)
 166                 return -ENOENT;
 167         return ent;
 168 }
 169
 170 static s32 bcma_erom_get_addr_desc(struct bcma_bus *bus, u32 **eromptr,
 171                                   u32 type, u8 port)
 172 {
 173         u32 addrl, addrh, sizel, sizeh = 0;
 174         u32 size;
 175
 176         u32 ent = bcma_erom_get_ent(bus, eromptr);
 177         if ((!(ent & SCAN_ER_VALID)) ||
 178             ((ent & SCAN_ER_TAGX) != SCAN_ER_TAG_ADDR) ||
 179             ((ent & SCAN_ADDR_TYPE) != type) ||
 180             (((ent & SCAN_ADDR_PORT) >> SCAN_ADDR_PORT_SHIFT) != port)) {
 181                 bcma_erom_push_ent(eromptr);
 182                 return -EINVAL;
 183         }
 184
 185         addrl = ent & SCAN_ADDR_ADDR;
 186         if (ent & SCAN_ADDR_AG32)
 187                 addrh = bcma_erom_get_ent(bus, eromptr);
 188         else
 189                 addrh = 0;
 190
 191         if ((ent & SCAN_ADDR_SZ) == SCAN_ADDR_SZ_SZD) {
 192                 size = bcma_erom_get_ent(bus, eromptr);
 193                 sizel = size & SCAN_SIZE_SZ;
 194                 if (size & SCAN_SIZE_SG32)
 195                         sizeh = bcma_erom_get_ent(bus, eromptr);
 196         } else
 197                 sizel = SCAN_ADDR_SZ_BASE <<
 198                                 ((ent & SCAN_ADDR_SZ) >> SCAN_ADDR_SZ_SHIFT);
 199
 200         return addrl;
 201 }
 202
 203 int bcma_bus_scan(struct bcma_bus *bus)
 204 {
 205         u32 erombase;
 206         u32 __iomem *eromptr, *eromend;
 207
 208         s32 cia, cib;
 209         u8 ports[2], wrappers[2];
 210
 211         s32 tmp;
 212         u8 i, j;
 213
 214         int err;
 215
 216         INIT_LIST_HEAD(&bus->cores);
 217         bus->nr_cores = 0;
 218
 219         bcma_scan_switch_core(bus, BCMA_ADDR_BASE);
 220
 221         tmp = bcma_scan_read32(bus, 0, BCMA_CC_ID);
 222         bus->chipinfo.id = (tmp & BCMA_CC_ID_ID) >> BCMA_CC_ID_ID_SHIFT;
 223         bus->chipinfo.rev = (tmp & BCMA_CC_ID_REV) >> BCMA_CC_ID_REV_SHIFT;
 224         bus->chipinfo.pkg = (tmp & BCMA_CC_ID_PKG) >> BCMA_CC_ID_PKG_SHIFT;
 225
 226         erombase = bcma_scan_read32(bus, 0, BCMA_CC_EROM);
 227         eromptr = bus->mmio;
 228         eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32);
 229
 230         bcma_scan_switch_core(bus, erombase);
 231
 232         while (eromptr < eromend) {
 233                 struct bcma_device *core = kzalloc(sizeof(*core), GFP_KERNEL);
 234                 if (!core)
 235                         return -ENOMEM;
 236                 INIT_LIST_HEAD(&core->list);
 237                 core->bus = bus;
 238
 239                 /* get CIs */
 240                 cia = bcma_erom_get_ci(bus, &eromptr);
 241                 if (cia < 0) {
 242                         bcma_erom_push_ent(&eromptr);
 243                         if (bcma_erom_is_end(bus, &eromptr))
 244                                 break;
 245                         err= -EILSEQ;
 246                         goto out;
 247                 }
 248                 cib = bcma_erom_get_ci(bus, &eromptr);
 249                 if (cib < 0) {
 250                         err= -EILSEQ;
 251                         goto out;
 252                 }
 253
 254                 /* parse CIs */
 255                 core->id.class = (cia & SCAN_CIA_CLASS) >> SCAN_CIA_CLASS_SHIFT;
 256                 core->id.id = (cia & SCAN_CIA_ID) >> SCAN_CIA_ID_SHIFT;
 257                 core->id.manuf = (cia & SCAN_CIA_MANUF) >> SCAN_CIA_MANUF_SHIFT;
 258                 ports[0] = (cib & SCAN_CIB_NMP) >> SCAN_CIB_NMP_SHIFT;
 259                 ports[1] = (cib & SCAN_CIB_NSP) >> SCAN_CIB_NSP_SHIFT;
 260                 wrappers[0] = (cib & SCAN_CIB_NMW) >> SCAN_CIB_NMW_SHIFT;
 261                 wrappers[1] = (cib & SCAN_CIB_NSW) >> SCAN_CIB_NSW_SHIFT;
 262                 core->id.rev = (cib & SCAN_CIB_REV) >> SCAN_CIB_REV_SHIFT;
 263
 264                 if (((core->id.manuf == BCMA_MANUF_ARM) &&
 265                      (core->id.id == 0xFFF)) ||
 266                     (ports[1] == 0)) {
 267                         bcma_erom_skip_component(bus, &eromptr);
 268                         continue;
 269                 }
 270
 271                 /* check if component is a core at all */
 272                 if (wrappers[0] + wrappers[1] == 0) {
 273                         /* we could save addrl of the router
 274                         if (cid == BCMA_CORE_OOB_ROUTER)
 275                          */
 276                         bcma_erom_skip_component(bus, &eromptr);
 277                         continue;
 278                 }
 279
 280                 if (bcma_erom_is_bridge(bus, &eromptr)) {
 281                         bcma_erom_skip_component(bus, &eromptr);
 282                         continue;
 283                 }
 284
 285                 /* get & parse master ports */
 286                 for (i = 0; i < ports[0]; i++) {
 287                         u32 mst_port_d = bcma_erom_get_mst_port(bus, &eromptr);
 288                         if (mst_port_d < 0) {
 289                                 err= -EILSEQ;
 290                                 goto out;
 291                         }
 292                 }
 293
 294                 /* get & parse slave ports */
 295                 for (i = 0; i < ports[1]; i++) {
 296                         for (j = 0; ; j++) {
 297                                 tmp = bcma_erom_get_addr_desc(bus, &eromptr,
 298                                         SCAN_ADDR_TYPE_SLAVE, i);
 299                                 if (tmp < 0) {
 300                                         /* no more entries for port _i_ */
 301                                         /* pr_debug("erom: slave port %d "
 302                                          * "has %d descriptors\n", i, j); */
 303                                         break;
 304                                 } else {
 305                                         if (i == 0 && j == 0)
 306                                                 core->addr = tmp;
 307                                 }
 308                         }
 309                 }
 310
 311                 /* get & parse master wrappers */
 312                 for (i = 0; i < wrappers[0]; i++) {
 313                         for (j = 0; ; j++) {
 314                                 tmp = bcma_erom_get_addr_desc(bus, &eromptr,
 315                                         SCAN_ADDR_TYPE_MWRAP, i);
 316                                 if (tmp < 0) {
 317                                         /* no more entries for port _i_ */
 318                                         /* pr_debug("erom: master wrapper %d "
 319                                          * "has %d descriptors\n", i, j); */
 320                                         break;
 321                                 } else {
 322                                         if (i == 0 && j == 0)
 323                                                 core->wrap = tmp;
 324                                 }
 325                         }
 326                 }
 327
 328                 /* get & parse slave wrappers */
 329                 for (i = 0; i < wrappers[1]; i++) {
 330                         u8 hack = (ports[1] == 1) ? 0 : 1;
 331                         for (j = 0; ; j++) {
 332                                 tmp = bcma_erom_get_addr_desc(bus, &eromptr,
 333                                         SCAN_ADDR_TYPE_SWRAP, i + hack);
 334                                 if (tmp < 0) {
 335                                         /* no more entries for port _i_ */
 336                                         /* pr_debug("erom: master wrapper %d "
 337                                          * has %d descriptors\n", i, j); */
 338                                         break;
 339                                 } else {
 340                                         if (wrappers[0] == 0 && !i && !j)
 341                                                 core->wrap = tmp;
 342                                 }
 343                         }
 344                 }
 345
 346                 pr_info("Core %d found: %s "
 347                         "(manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
 348                         bus->nr_cores, bcma_device_name(&core->id),
 349                         core->id.manuf, core->id.id, core->id.rev,
 350                         core->id.class);
 351
 352                 core->core_index = bus->nr_cores++;
 353                 list_add(&core->list, &bus->cores);
 354                 continue;
 355 out:
 356                 return err;
 357         }
 358
 359         return 0;
 360 }