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 23 static const struct bcma_device_id_name bcma_arm_device_names[] = { 24 { BCMA_CORE_4706_MAC_GBIT_COMMON, "BCM4706 GBit MAC Common" }, 25 { BCMA_CORE_ARM_1176, "ARM 1176" }, 26 { BCMA_CORE_ARM_7TDMI, "ARM 7TDMI" }, 27 { BCMA_CORE_ARM_CM3, "ARM CM3" }, 28 }; 29 30 static const struct bcma_device_id_name bcma_bcm_device_names[] = { 31 { BCMA_CORE_OOB_ROUTER, "OOB Router" }, 32 { BCMA_CORE_4706_CHIPCOMMON, "BCM4706 ChipCommon" }, 33 { BCMA_CORE_4706_SOC_RAM, "BCM4706 SOC RAM" }, 34 { BCMA_CORE_4706_MAC_GBIT, "BCM4706 GBit MAC" }, 35 { BCMA_CORE_NS_PCIEG2, "PCIe Gen 2" }, 36 { BCMA_CORE_NS_DMA, "DMA" }, 37 { BCMA_CORE_NS_SDIO3, "SDIO3" }, 38 { BCMA_CORE_NS_USB20, "USB 2.0" }, 39 { BCMA_CORE_NS_USB30, "USB 3.0" }, 40 { BCMA_CORE_NS_A9JTAG, "ARM Cortex A9 JTAG" }, 41 { BCMA_CORE_NS_DDR23, "Denali DDR2/DDR3 memory controller" }, 42 { BCMA_CORE_NS_ROM, "ROM" }, 43 { BCMA_CORE_NS_NAND, "NAND flash controller" }, 44 { BCMA_CORE_NS_QSPI, "SPI flash controller" }, 45 { BCMA_CORE_NS_CHIPCOMMON_B, "Chipcommon B" }, 46 { BCMA_CORE_ARMCA9, "ARM Cortex A9 core (ihost)" }, 47 { BCMA_CORE_AMEMC, "AMEMC (DDR)" }, 48 { BCMA_CORE_ALTA, "ALTA (I2S)" }, 49 { BCMA_CORE_INVALID, "Invalid" }, 50 { BCMA_CORE_CHIPCOMMON, "ChipCommon" }, 51 { BCMA_CORE_ILINE20, "ILine 20" }, 52 { BCMA_CORE_SRAM, "SRAM" }, 53 { BCMA_CORE_SDRAM, "SDRAM" }, 54 { BCMA_CORE_PCI, "PCI" }, 55 { BCMA_CORE_ETHERNET, "Fast Ethernet" }, 56 { BCMA_CORE_V90, "V90" }, 57 { BCMA_CORE_USB11_HOSTDEV, "USB 1.1 Hostdev" }, 58 { BCMA_CORE_ADSL, "ADSL" }, 59 { BCMA_CORE_ILINE100, "ILine 100" }, 60 { BCMA_CORE_IPSEC, "IPSEC" }, 61 { BCMA_CORE_UTOPIA, "UTOPIA" }, 62 { BCMA_CORE_PCMCIA, "PCMCIA" }, 63 { BCMA_CORE_INTERNAL_MEM, "Internal Memory" }, 64 { BCMA_CORE_MEMC_SDRAM, "MEMC SDRAM" }, 65 { BCMA_CORE_OFDM, "OFDM" }, 66 { BCMA_CORE_EXTIF, "EXTIF" }, 67 { BCMA_CORE_80211, "IEEE 802.11" }, 68 { BCMA_CORE_PHY_A, "PHY A" }, 69 { BCMA_CORE_PHY_B, "PHY B" }, 70 { BCMA_CORE_PHY_G, "PHY G" }, 71 { BCMA_CORE_USB11_HOST, "USB 1.1 Host" }, 72 { BCMA_CORE_USB11_DEV, "USB 1.1 Device" }, 73 { BCMA_CORE_USB20_HOST, "USB 2.0 Host" }, 74 { BCMA_CORE_USB20_DEV, "USB 2.0 Device" }, 75 { BCMA_CORE_SDIO_HOST, "SDIO Host" }, 76 { BCMA_CORE_ROBOSWITCH, "Roboswitch" }, 77 { BCMA_CORE_PARA_ATA, "PATA" }, 78 { BCMA_CORE_SATA_XORDMA, "SATA XOR-DMA" }, 79 { BCMA_CORE_ETHERNET_GBIT, "GBit Ethernet" }, 80 { BCMA_CORE_PCIE, "PCIe" }, 81 { BCMA_CORE_PHY_N, "PHY N" }, 82 { BCMA_CORE_SRAM_CTL, "SRAM Controller" }, 83 { BCMA_CORE_MINI_MACPHY, "Mini MACPHY" }, 84 { BCMA_CORE_PHY_LP, "PHY LP" }, 85 { BCMA_CORE_PMU, "PMU" }, 86 { BCMA_CORE_PHY_SSN, "PHY SSN" }, 87 { BCMA_CORE_SDIO_DEV, "SDIO Device" }, 88 { BCMA_CORE_PHY_HT, "PHY HT" }, 89 { BCMA_CORE_MAC_GBIT, "GBit MAC" }, 90 { BCMA_CORE_DDR12_MEM_CTL, "DDR1/DDR2 Memory Controller" }, 91 { BCMA_CORE_PCIE_RC, "PCIe Root Complex" }, 92 { BCMA_CORE_OCP_OCP_BRIDGE, "OCP to OCP Bridge" }, 93 { BCMA_CORE_SHARED_COMMON, "Common Shared" }, 94 { BCMA_CORE_OCP_AHB_BRIDGE, "OCP to AHB Bridge" }, 95 { BCMA_CORE_SPI_HOST, "SPI Host" }, 96 { BCMA_CORE_I2S, "I2S" }, 97 { BCMA_CORE_SDR_DDR1_MEM_CTL, "SDR/DDR1 Memory Controller" }, 98 { BCMA_CORE_SHIM, "SHIM" }, 99 { BCMA_CORE_PCIE2, "PCIe Gen2" }, 100 { BCMA_CORE_ARM_CR4, "ARM CR4" }, 101 { BCMA_CORE_GCI, "GCI" }, 102 { BCMA_CORE_CMEM, "CNDS DDR2/3 memory controller" }, 103 { BCMA_CORE_ARM_CA7, "ARM CA7" }, 104 { BCMA_CORE_DEFAULT, "Default" }, 105 }; 106 107 static const struct bcma_device_id_name bcma_mips_device_names[] = { 108 { BCMA_CORE_MIPS, "MIPS" }, 109 { BCMA_CORE_MIPS_3302, "MIPS 3302" }, 110 { BCMA_CORE_MIPS_74K, "MIPS 74K" }, 111 }; 112 113 static const char *bcma_device_name(const struct bcma_device_id *id) 114 { 115 const struct bcma_device_id_name *names; 116 int size, i; 117 118 /* search manufacturer specific names */ 119 switch (id->manuf) { 120 case BCMA_MANUF_ARM: 121 names = bcma_arm_device_names; 122 size = ARRAY_SIZE(bcma_arm_device_names); 123 break; 124 case BCMA_MANUF_BCM: 125 names = bcma_bcm_device_names; 126 size = ARRAY_SIZE(bcma_bcm_device_names); 127 break; 128 case BCMA_MANUF_MIPS: 129 names = bcma_mips_device_names; 130 size = ARRAY_SIZE(bcma_mips_device_names); 131 break; 132 default: 133 return "UNKNOWN"; 134 } 135 136 for (i = 0; i < size; i++) { 137 if (names[i].id == id->id) 138 return names[i].name; 139 } 140 141 return "UNKNOWN"; 142 } 143 144 static u32 bcma_scan_read32(struct bcma_bus *bus, u8 current_coreidx, 145 u16 offset) 146 { 147 return readl(bus->mmio + offset); 148 } 149 150 static void bcma_scan_switch_core(struct bcma_bus *bus, u32 addr) 151 { 152 if (bus->hosttype == BCMA_HOSTTYPE_PCI) 153 pci_write_config_dword(bus->host_pci, BCMA_PCI_BAR0_WIN, 154 addr); 155 } 156 157 static u32 bcma_erom_get_ent(struct bcma_bus *bus, u32 __iomem **eromptr) 158 { 159 u32 ent = readl(*eromptr); 160 (*eromptr)++; 161 return ent; 162 } 163 164 static void bcma_erom_push_ent(u32 __iomem **eromptr) 165 { 166 (*eromptr)--; 167 } 168 169 static s32 bcma_erom_get_ci(struct bcma_bus *bus, u32 __iomem **eromptr) 170 { 171 u32 ent = bcma_erom_get_ent(bus, eromptr); 172 if (!(ent & SCAN_ER_VALID)) 173 return -ENOENT; 174 if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_CI) 175 return -ENOENT; 176 return ent; 177 } 178 179 static bool bcma_erom_is_end(struct bcma_bus *bus, u32 __iomem **eromptr) 180 { 181 u32 ent = bcma_erom_get_ent(bus, eromptr); 182 bcma_erom_push_ent(eromptr); 183 return (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID)); 184 } 185 186 static bool bcma_erom_is_bridge(struct bcma_bus *bus, u32 __iomem **eromptr) 187 { 188 u32 ent = bcma_erom_get_ent(bus, eromptr); 189 bcma_erom_push_ent(eromptr); 190 return (((ent & SCAN_ER_VALID)) && 191 ((ent & SCAN_ER_TAGX) == SCAN_ER_TAG_ADDR) && 192 ((ent & SCAN_ADDR_TYPE) == SCAN_ADDR_TYPE_BRIDGE)); 193 } 194 195 static void bcma_erom_skip_component(struct bcma_bus *bus, u32 __iomem **eromptr) 196 { 197 u32 ent; 198 while (1) { 199 ent = bcma_erom_get_ent(bus, eromptr); 200 if ((ent & SCAN_ER_VALID) && 201 ((ent & SCAN_ER_TAG) == SCAN_ER_TAG_CI)) 202 break; 203 if (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID)) 204 break; 205 } 206 bcma_erom_push_ent(eromptr); 207 } 208 209 static s32 bcma_erom_get_mst_port(struct bcma_bus *bus, u32 __iomem **eromptr) 210 { 211 u32 ent = bcma_erom_get_ent(bus, eromptr); 212 if (!(ent & SCAN_ER_VALID)) 213 return -ENOENT; 214 if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_MP) 215 return -ENOENT; 216 return ent; 217 } 218 219 static u32 bcma_erom_get_addr_desc(struct bcma_bus *bus, u32 __iomem **eromptr, 220 u32 type, u8 port) 221 { 222 u32 addrl; 223 u32 size; 224 225 u32 ent = bcma_erom_get_ent(bus, eromptr); 226 if ((!(ent & SCAN_ER_VALID)) || 227 ((ent & SCAN_ER_TAGX) != SCAN_ER_TAG_ADDR) || 228 ((ent & SCAN_ADDR_TYPE) != type) || 229 (((ent & SCAN_ADDR_PORT) >> SCAN_ADDR_PORT_SHIFT) != port)) { 230 bcma_erom_push_ent(eromptr); 231 return (u32)-EINVAL; 232 } 233 234 addrl = ent & SCAN_ADDR_ADDR; 235 if (ent & SCAN_ADDR_AG32) 236 bcma_erom_get_ent(bus, eromptr); 237 238 if ((ent & SCAN_ADDR_SZ) == SCAN_ADDR_SZ_SZD) { 239 size = bcma_erom_get_ent(bus, eromptr); 240 if (size & SCAN_SIZE_SG32) 241 bcma_erom_get_ent(bus, eromptr); 242 } 243 244 return addrl; 245 } 246 247 static struct bcma_device *bcma_find_core_by_index(struct bcma_bus *bus, 248 u16 index) 249 { 250 struct bcma_device *core; 251 252 list_for_each_entry(core, &bus->cores, list) { 253 if (core->core_index == index) 254 return core; 255 } 256 return NULL; 257 } 258 259 static struct bcma_device *bcma_find_core_reverse(struct bcma_bus *bus, u16 coreid) 260 { 261 struct bcma_device *core; 262 263 list_for_each_entry_reverse(core, &bus->cores, list) { 264 if (core->id.id == coreid) 265 return core; 266 } 267 return NULL; 268 } 269 270 #define IS_ERR_VALUE_U32(x) ((x) >= (u32)-MAX_ERRNO) 271 272 static int bcma_get_next_core(struct bcma_bus *bus, u32 __iomem **eromptr, 273 struct bcma_device_id *match, int core_num, 274 struct bcma_device *core) 275 { 276 u32 tmp; 277 u8 i, j, k; 278 s32 cia, cib; 279 u8 ports[2], wrappers[2]; 280 281 /* get CIs */ 282 cia = bcma_erom_get_ci(bus, eromptr); 283 if (cia < 0) { 284 bcma_erom_push_ent(eromptr); 285 if (bcma_erom_is_end(bus, eromptr)) 286 return -ESPIPE; 287 return -EILSEQ; 288 } 289 cib = bcma_erom_get_ci(bus, eromptr); 290 if (cib < 0) 291 return -EILSEQ; 292 293 /* parse CIs */ 294 core->id.class = (cia & SCAN_CIA_CLASS) >> SCAN_CIA_CLASS_SHIFT; 295 core->id.id = (cia & SCAN_CIA_ID) >> SCAN_CIA_ID_SHIFT; 296 core->id.manuf = (cia & SCAN_CIA_MANUF) >> SCAN_CIA_MANUF_SHIFT; 297 ports[0] = (cib & SCAN_CIB_NMP) >> SCAN_CIB_NMP_SHIFT; 298 ports[1] = (cib & SCAN_CIB_NSP) >> SCAN_CIB_NSP_SHIFT; 299 wrappers[0] = (cib & SCAN_CIB_NMW) >> SCAN_CIB_NMW_SHIFT; 300 wrappers[1] = (cib & SCAN_CIB_NSW) >> SCAN_CIB_NSW_SHIFT; 301 core->id.rev = (cib & SCAN_CIB_REV) >> SCAN_CIB_REV_SHIFT; 302 303 if (((core->id.manuf == BCMA_MANUF_ARM) && 304 (core->id.id == 0xFFF)) || 305 (ports[1] == 0)) { 306 bcma_erom_skip_component(bus, eromptr); 307 return -ENXIO; 308 } 309 310 /* check if component is a core at all */ 311 if (wrappers[0] + wrappers[1] == 0) { 312 /* Some specific cores don't need wrappers */ 313 switch (core->id.id) { 314 case BCMA_CORE_4706_MAC_GBIT_COMMON: 315 case BCMA_CORE_NS_CHIPCOMMON_B: 316 case BCMA_CORE_PMU: 317 case BCMA_CORE_GCI: 318 /* Not used yet: case BCMA_CORE_OOB_ROUTER: */ 319 break; 320 default: 321 bcma_erom_skip_component(bus, eromptr); 322 return -ENXIO; 323 } 324 } 325 326 if (bcma_erom_is_bridge(bus, eromptr)) { 327 bcma_erom_skip_component(bus, eromptr); 328 return -ENXIO; 329 } 330 331 if (bcma_find_core_by_index(bus, core_num)) { 332 bcma_erom_skip_component(bus, eromptr); 333 return -ENODEV; 334 } 335 336 if (match && ((match->manuf != BCMA_ANY_MANUF && 337 match->manuf != core->id.manuf) || 338 (match->id != BCMA_ANY_ID && match->id != core->id.id) || 339 (match->rev != BCMA_ANY_REV && match->rev != core->id.rev) || 340 (match->class != BCMA_ANY_CLASS && match->class != core->id.class) 341 )) { 342 bcma_erom_skip_component(bus, eromptr); 343 return -ENODEV; 344 } 345 346 /* get & parse master ports */ 347 for (i = 0; i < ports[0]; i++) { 348 s32 mst_port_d = bcma_erom_get_mst_port(bus, eromptr); 349 if (mst_port_d < 0) 350 return -EILSEQ; 351 } 352 353 /* First Slave Address Descriptor should be port 0: 354 * the main register space for the core 355 */ 356 tmp = bcma_erom_get_addr_desc(bus, eromptr, SCAN_ADDR_TYPE_SLAVE, 0); 357 if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) { 358 /* Try again to see if it is a bridge */ 359 tmp = bcma_erom_get_addr_desc(bus, eromptr, 360 SCAN_ADDR_TYPE_BRIDGE, 0); 361 if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) { 362 return -EILSEQ; 363 } else { 364 bcma_info(bus, "Bridge found\n"); 365 return -ENXIO; 366 } 367 } 368 core->addr = tmp; 369 370 /* get & parse slave ports */ 371 k = 0; 372 for (i = 0; i < ports[1]; i++) { 373 for (j = 0; ; j++) { 374 tmp = bcma_erom_get_addr_desc(bus, eromptr, 375 SCAN_ADDR_TYPE_SLAVE, i); 376 if (IS_ERR_VALUE_U32(tmp)) { 377 /* no more entries for port _i_ */ 378 /* pr_debug("erom: slave port %d " 379 * "has %d descriptors\n", i, j); */ 380 break; 381 } else if (k < ARRAY_SIZE(core->addr_s)) { 382 core->addr_s[k] = tmp; 383 k++; 384 } 385 } 386 } 387 388 /* get & parse master wrappers */ 389 for (i = 0; i < wrappers[0]; i++) { 390 for (j = 0; ; j++) { 391 tmp = bcma_erom_get_addr_desc(bus, eromptr, 392 SCAN_ADDR_TYPE_MWRAP, i); 393 if (IS_ERR_VALUE_U32(tmp)) { 394 /* no more entries for port _i_ */ 395 /* pr_debug("erom: master wrapper %d " 396 * "has %d descriptors\n", i, j); */ 397 break; 398 } else { 399 if (i == 0 && j == 0) 400 core->wrap = tmp; 401 } 402 } 403 } 404 405 /* get & parse slave wrappers */ 406 for (i = 0; i < wrappers[1]; i++) { 407 u8 hack = (ports[1] == 1) ? 0 : 1; 408 for (j = 0; ; j++) { 409 tmp = bcma_erom_get_addr_desc(bus, eromptr, 410 SCAN_ADDR_TYPE_SWRAP, i + hack); 411 if (IS_ERR_VALUE_U32(tmp)) { 412 /* no more entries for port _i_ */ 413 /* pr_debug("erom: master wrapper %d " 414 * has %d descriptors\n", i, j); */ 415 break; 416 } else { 417 if (wrappers[0] == 0 && !i && !j) 418 core->wrap = tmp; 419 } 420 } 421 } 422 if (bus->hosttype == BCMA_HOSTTYPE_SOC) { 423 core->io_addr = ioremap(core->addr, BCMA_CORE_SIZE); 424 if (!core->io_addr) 425 return -ENOMEM; 426 if (core->wrap) { 427 core->io_wrap = ioremap(core->wrap, 428 BCMA_CORE_SIZE); 429 if (!core->io_wrap) { 430 iounmap(core->io_addr); 431 return -ENOMEM; 432 } 433 } 434 } 435 return 0; 436 } 437 438 void bcma_detect_chip(struct bcma_bus *bus) 439 { 440 s32 tmp; 441 struct bcma_chipinfo *chipinfo = &(bus->chipinfo); 442 char chip_id[8]; 443 444 bcma_scan_switch_core(bus, BCMA_ADDR_BASE); 445 446 tmp = bcma_scan_read32(bus, 0, BCMA_CC_ID); 447 chipinfo->id = (tmp & BCMA_CC_ID_ID) >> BCMA_CC_ID_ID_SHIFT; 448 chipinfo->rev = (tmp & BCMA_CC_ID_REV) >> BCMA_CC_ID_REV_SHIFT; 449 chipinfo->pkg = (tmp & BCMA_CC_ID_PKG) >> BCMA_CC_ID_PKG_SHIFT; 450 451 snprintf(chip_id, ARRAY_SIZE(chip_id), 452 (chipinfo->id > 0x9999) ? "%d" : "0x%04X", chipinfo->id); 453 bcma_info(bus, "Found chip with id %s, rev 0x%02X and package 0x%02X\n", 454 chip_id, chipinfo->rev, chipinfo->pkg); 455 } 456 457 int bcma_bus_scan(struct bcma_bus *bus) 458 { 459 u32 erombase; 460 u32 __iomem *eromptr, *eromend; 461 462 int err, core_num = 0; 463 464 /* Skip if bus was already scanned (e.g. during early register) */ 465 if (bus->nr_cores) 466 return 0; 467 468 erombase = bcma_scan_read32(bus, 0, BCMA_CC_EROM); 469 if (bus->hosttype == BCMA_HOSTTYPE_SOC) { 470 eromptr = ioremap(erombase, BCMA_CORE_SIZE); 471 if (!eromptr) 472 return -ENOMEM; 473 } else { 474 eromptr = bus->mmio; 475 } 476 477 eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32); 478 479 bcma_scan_switch_core(bus, erombase); 480 481 while (eromptr < eromend) { 482 struct bcma_device *other_core; 483 struct bcma_device *core = kzalloc(sizeof(*core), GFP_KERNEL); 484 if (!core) { 485 err = -ENOMEM; 486 goto out; 487 } 488 INIT_LIST_HEAD(&core->list); 489 core->bus = bus; 490 491 err = bcma_get_next_core(bus, &eromptr, NULL, core_num, core); 492 if (err < 0) { 493 kfree(core); 494 if (err == -ENODEV) { 495 core_num++; 496 continue; 497 } else if (err == -ENXIO) { 498 continue; 499 } else if (err == -ESPIPE) { 500 break; 501 } 502 goto out; 503 } 504 505 core->core_index = core_num++; 506 bus->nr_cores++; 507 other_core = bcma_find_core_reverse(bus, core->id.id); 508 core->core_unit = (other_core == NULL) ? 0 : other_core->core_unit + 1; 509 bcma_prepare_core(bus, core); 510 511 bcma_info(bus, "Core %d found: %s (manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n", 512 core->core_index, bcma_device_name(&core->id), 513 core->id.manuf, core->id.id, core->id.rev, 514 core->id.class); 515 516 list_add_tail(&core->list, &bus->cores); 517 } 518 519 err = 0; 520 out: 521 if (bus->hosttype == BCMA_HOSTTYPE_SOC) 522 iounmap(eromptr); 523 524 return err; 525 } 526