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 18struct bcma_device_id_name { 19 u16 id; 20 const char *name; 21}; 22 23static 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 30static 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 107static 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 113static 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 144static u32 bcma_scan_read32(struct bcma_bus *bus, u16 offset) 145{ 146 return readl(bus->mmio + offset); 147} 148 149static void bcma_scan_switch_core(struct bcma_bus *bus, u32 addr) 150{ 151 if (bus->hosttype == BCMA_HOSTTYPE_PCI) 152 pci_write_config_dword(bus->host_pci, BCMA_PCI_BAR0_WIN, 153 addr); 154} 155 156static u32 bcma_erom_get_ent(struct bcma_bus *bus, u32 __iomem **eromptr) 157{ 158 u32 ent = readl(*eromptr); 159 (*eromptr)++; 160 return ent; 161} 162 163static void bcma_erom_push_ent(u32 __iomem **eromptr) 164{ 165 (*eromptr)--; 166} 167 168static s32 bcma_erom_get_ci(struct bcma_bus *bus, u32 __iomem **eromptr) 169{ 170 u32 ent = bcma_erom_get_ent(bus, eromptr); 171 if (!(ent & SCAN_ER_VALID)) 172 return -ENOENT; 173 if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_CI) 174 return -ENOENT; 175 return ent; 176} 177 178static bool bcma_erom_is_end(struct bcma_bus *bus, u32 __iomem **eromptr) 179{ 180 u32 ent = bcma_erom_get_ent(bus, eromptr); 181 bcma_erom_push_ent(eromptr); 182 return (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID)); 183} 184 185static bool bcma_erom_is_bridge(struct bcma_bus *bus, u32 __iomem **eromptr) 186{ 187 u32 ent = bcma_erom_get_ent(bus, eromptr); 188 bcma_erom_push_ent(eromptr); 189 return (((ent & SCAN_ER_VALID)) && 190 ((ent & SCAN_ER_TAGX) == SCAN_ER_TAG_ADDR) && 191 ((ent & SCAN_ADDR_TYPE) == SCAN_ADDR_TYPE_BRIDGE)); 192} 193 194static void bcma_erom_skip_component(struct bcma_bus *bus, u32 __iomem **eromptr) 195{ 196 u32 ent; 197 while (1) { 198 ent = bcma_erom_get_ent(bus, eromptr); 199 if ((ent & SCAN_ER_VALID) && 200 ((ent & SCAN_ER_TAG) == SCAN_ER_TAG_CI)) 201 break; 202 if (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID)) 203 break; 204 } 205 bcma_erom_push_ent(eromptr); 206} 207 208static s32 bcma_erom_get_mst_port(struct bcma_bus *bus, u32 __iomem **eromptr) 209{ 210 u32 ent = bcma_erom_get_ent(bus, eromptr); 211 if (!(ent & SCAN_ER_VALID)) 212 return -ENOENT; 213 if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_MP) 214 return -ENOENT; 215 return ent; 216} 217 218static u32 bcma_erom_get_addr_desc(struct bcma_bus *bus, u32 __iomem **eromptr, 219 u32 type, u8 port) 220{ 221 u32 addrl; 222 u32 size; 223 224 u32 ent = bcma_erom_get_ent(bus, eromptr); 225 if ((!(ent & SCAN_ER_VALID)) || 226 ((ent & SCAN_ER_TAGX) != SCAN_ER_TAG_ADDR) || 227 ((ent & SCAN_ADDR_TYPE) != type) || 228 (((ent & SCAN_ADDR_PORT) >> SCAN_ADDR_PORT_SHIFT) != port)) { 229 bcma_erom_push_ent(eromptr); 230 return (u32)-EINVAL; 231 } 232 233 addrl = ent & SCAN_ADDR_ADDR; 234 if (ent & SCAN_ADDR_AG32) 235 bcma_erom_get_ent(bus, eromptr); 236 237 if ((ent & SCAN_ADDR_SZ) == SCAN_ADDR_SZ_SZD) { 238 size = bcma_erom_get_ent(bus, eromptr); 239 if (size & SCAN_SIZE_SG32) 240 bcma_erom_get_ent(bus, eromptr); 241 } 242 243 return addrl; 244} 245 246static struct bcma_device *bcma_find_core_by_index(struct bcma_bus *bus, 247 u16 index) 248{ 249 struct bcma_device *core; 250 251 list_for_each_entry(core, &bus->cores, list) { 252 if (core->core_index == index) 253 return core; 254 } 255 return NULL; 256} 257 258static struct bcma_device *bcma_find_core_reverse(struct bcma_bus *bus, u16 coreid) 259{ 260 struct bcma_device *core; 261 262 list_for_each_entry_reverse(core, &bus->cores, list) { 263 if (core->id.id == coreid) 264 return core; 265 } 266 return NULL; 267} 268 269#define IS_ERR_VALUE_U32(x) ((x) >= (u32)-MAX_ERRNO) 270 271static int bcma_get_next_core(struct bcma_bus *bus, u32 __iomem **eromptr, 272 struct bcma_device_id *match, int core_num, 273 struct bcma_device *core) 274{ 275 u32 tmp; 276 u8 i, j, k; 277 s32 cia, cib; 278 u8 ports[2], wrappers[2]; 279 280 /* get CIs */ 281 cia = bcma_erom_get_ci(bus, eromptr); 282 if (cia < 0) { 283 bcma_erom_push_ent(eromptr); 284 if (bcma_erom_is_end(bus, eromptr)) 285 return -ESPIPE; 286 return -EILSEQ; 287 } 288 cib = bcma_erom_get_ci(bus, eromptr); 289 if (cib < 0) 290 return -EILSEQ; 291 292 /* parse CIs */ 293 core->id.class = (cia & SCAN_CIA_CLASS) >> SCAN_CIA_CLASS_SHIFT; 294 core->id.id = (cia & SCAN_CIA_ID) >> SCAN_CIA_ID_SHIFT; 295 core->id.manuf = (cia & SCAN_CIA_MANUF) >> SCAN_CIA_MANUF_SHIFT; 296 ports[0] = (cib & SCAN_CIB_NMP) >> SCAN_CIB_NMP_SHIFT; 297 ports[1] = (cib & SCAN_CIB_NSP) >> SCAN_CIB_NSP_SHIFT; 298 wrappers[0] = (cib & SCAN_CIB_NMW) >> SCAN_CIB_NMW_SHIFT; 299 wrappers[1] = (cib & SCAN_CIB_NSW) >> SCAN_CIB_NSW_SHIFT; 300 core->id.rev = (cib & SCAN_CIB_REV) >> SCAN_CIB_REV_SHIFT; 301 302 if (((core->id.manuf == BCMA_MANUF_ARM) && 303 (core->id.id == 0xFFF)) || 304 (ports[1] == 0)) { 305 bcma_erom_skip_component(bus, eromptr); 306 return -ENXIO; 307 } 308 309 /* check if component is a core at all */ 310 if (wrappers[0] + wrappers[1] == 0) { 311 /* Some specific cores don't need wrappers */ 312 switch (core->id.id) { 313 case BCMA_CORE_4706_MAC_GBIT_COMMON: 314 case BCMA_CORE_NS_CHIPCOMMON_B: 315 case BCMA_CORE_PMU: 316 case BCMA_CORE_GCI: 317 /* Not used yet: case BCMA_CORE_OOB_ROUTER: */ 318 break; 319 default: 320 bcma_erom_skip_component(bus, eromptr); 321 return -ENXIO; 322 } 323 } 324 325 if (bcma_erom_is_bridge(bus, eromptr)) { 326 bcma_erom_skip_component(bus, eromptr); 327 return -ENXIO; 328 } 329 330 if (bcma_find_core_by_index(bus, core_num)) { 331 bcma_erom_skip_component(bus, eromptr); 332 return -ENODEV; 333 } 334 335 if (match && ((match->manuf != BCMA_ANY_MANUF && 336 match->manuf != core->id.manuf) || 337 (match->id != BCMA_ANY_ID && match->id != core->id.id) || 338 (match->rev != BCMA_ANY_REV && match->rev != core->id.rev) || 339 (match->class != BCMA_ANY_CLASS && match->class != core->id.class) 340 )) { 341 bcma_erom_skip_component(bus, eromptr); 342 return -ENODEV; 343 } 344 345 /* get & parse master ports */ 346 for (i = 0; i < ports[0]; i++) { 347 s32 mst_port_d = bcma_erom_get_mst_port(bus, eromptr); 348 if (mst_port_d < 0) 349 return -EILSEQ; 350 } 351 352 /* First Slave Address Descriptor should be port 0: 353 * the main register space for the core 354 */ 355 tmp = bcma_erom_get_addr_desc(bus, eromptr, SCAN_ADDR_TYPE_SLAVE, 0); 356 if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) { 357 /* Try again to see if it is a bridge */ 358 tmp = bcma_erom_get_addr_desc(bus, eromptr, 359 SCAN_ADDR_TYPE_BRIDGE, 0); 360 if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) { 361 return -EILSEQ; 362 } else { 363 bcma_info(bus, "Bridge found\n"); 364 return -ENXIO; 365 } 366 } 367 core->addr = tmp; 368 369 /* get & parse slave ports */ 370 k = 0; 371 for (i = 0; i < ports[1]; i++) { 372 for (j = 0; ; j++) { 373 tmp = bcma_erom_get_addr_desc(bus, eromptr, 374 SCAN_ADDR_TYPE_SLAVE, i); 375 if (IS_ERR_VALUE_U32(tmp)) { 376 /* no more entries for port _i_ */ 377 /* pr_debug("erom: slave port %d " 378 * "has %d descriptors\n", i, j); */ 379 break; 380 } else if (k < ARRAY_SIZE(core->addr_s)) { 381 core->addr_s[k] = tmp; 382 k++; 383 } 384 } 385 } 386 387 /* get & parse master wrappers */ 388 for (i = 0; i < wrappers[0]; i++) { 389 for (j = 0; ; j++) { 390 tmp = bcma_erom_get_addr_desc(bus, eromptr, 391 SCAN_ADDR_TYPE_MWRAP, i); 392 if (IS_ERR_VALUE_U32(tmp)) { 393 /* no more entries for port _i_ */ 394 /* pr_debug("erom: master wrapper %d " 395 * "has %d descriptors\n", i, j); */ 396 break; 397 } else { 398 if (i == 0 && j == 0) 399 core->wrap = tmp; 400 } 401 } 402 } 403 404 /* get & parse slave wrappers */ 405 for (i = 0; i < wrappers[1]; i++) { 406 u8 hack = (ports[1] == 1) ? 0 : 1; 407 for (j = 0; ; j++) { 408 tmp = bcma_erom_get_addr_desc(bus, eromptr, 409 SCAN_ADDR_TYPE_SWRAP, i + hack); 410 if (IS_ERR_VALUE_U32(tmp)) { 411 /* no more entries for port _i_ */ 412 /* pr_debug("erom: master wrapper %d " 413 * has %d descriptors\n", i, j); */ 414 break; 415 } else { 416 if (wrappers[0] == 0 && !i && !j) 417 core->wrap = tmp; 418 } 419 } 420 } 421 if (bus->hosttype == BCMA_HOSTTYPE_SOC) { 422 core->io_addr = ioremap(core->addr, BCMA_CORE_SIZE); 423 if (!core->io_addr) 424 return -ENOMEM; 425 if (core->wrap) { 426 core->io_wrap = ioremap(core->wrap, 427 BCMA_CORE_SIZE); 428 if (!core->io_wrap) { 429 iounmap(core->io_addr); 430 return -ENOMEM; 431 } 432 } 433 } 434 return 0; 435} 436 437void bcma_detect_chip(struct bcma_bus *bus) 438{ 439 s32 tmp; 440 struct bcma_chipinfo *chipinfo = &(bus->chipinfo); 441 char chip_id[8]; 442 443 bcma_scan_switch_core(bus, BCMA_ADDR_BASE); 444 445 tmp = bcma_scan_read32(bus, BCMA_CC_ID); 446 chipinfo->id = (tmp & BCMA_CC_ID_ID) >> BCMA_CC_ID_ID_SHIFT; 447 chipinfo->rev = (tmp & BCMA_CC_ID_REV) >> BCMA_CC_ID_REV_SHIFT; 448 chipinfo->pkg = (tmp & BCMA_CC_ID_PKG) >> BCMA_CC_ID_PKG_SHIFT; 449 450 snprintf(chip_id, ARRAY_SIZE(chip_id), 451 (chipinfo->id > 0x9999) ? "%d" : "0x%04X", chipinfo->id); 452 bcma_info(bus, "Found chip with id %s, rev 0x%02X and package 0x%02X\n", 453 chip_id, chipinfo->rev, chipinfo->pkg); 454} 455 456int bcma_bus_scan(struct bcma_bus *bus) 457{ 458 u32 erombase; 459 u32 __iomem *eromptr, *eromend; 460 461 int err, core_num = 0; 462 463 /* Skip if bus was already scanned (e.g. during early register) */ 464 if (bus->nr_cores) 465 return 0; 466 467 erombase = bcma_scan_read32(bus, BCMA_CC_EROM); 468 if (bus->hosttype == BCMA_HOSTTYPE_SOC) { 469 eromptr = ioremap(erombase, BCMA_CORE_SIZE); 470 if (!eromptr) 471 return -ENOMEM; 472 } else { 473 eromptr = bus->mmio; 474 } 475 476 eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32); 477 478 bcma_scan_switch_core(bus, erombase); 479 480 while (eromptr < eromend) { 481 struct bcma_device *other_core; 482 struct bcma_device *core = kzalloc(sizeof(*core), GFP_KERNEL); 483 if (!core) { 484 err = -ENOMEM; 485 goto out; 486 } 487 INIT_LIST_HEAD(&core->list); 488 core->bus = bus; 489 490 err = bcma_get_next_core(bus, &eromptr, NULL, core_num, core); 491 if (err < 0) { 492 kfree(core); 493 if (err == -ENODEV) { 494 core_num++; 495 continue; 496 } else if (err == -ENXIO) { 497 continue; 498 } else if (err == -ESPIPE) { 499 break; 500 } 501 goto out; 502 } 503 504 core->core_index = core_num++; 505 bus->nr_cores++; 506 other_core = bcma_find_core_reverse(bus, core->id.id); 507 core->core_unit = (other_core == NULL) ? 0 : other_core->core_unit + 1; 508 bcma_prepare_core(bus, core); 509 510 bcma_info(bus, "Core %d found: %s (manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n", 511 core->core_index, bcma_device_name(&core->id), 512 core->id.manuf, core->id.id, core->id.rev, 513 core->id.class); 514 515 list_add_tail(&core->list, &bus->cores); 516 } 517 518 err = 0; 519out: 520 if (bus->hosttype == BCMA_HOSTTYPE_SOC) 521 iounmap(eromptr); 522 523 return err; 524} 525