1 /* 2 * Sonics Silicon Backplane 3 * Bus scanning 4 * 5 * Copyright (C) 2005-2007 Michael Buesch <m@bues.ch> 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 "ssb_private.h" 16 17 #include <linux/ssb/ssb.h> 18 #include <linux/ssb/ssb_regs.h> 19 #include <linux/pci.h> 20 #include <linux/io.h> 21 22 #include <pcmcia/cistpl.h> 23 #include <pcmcia/ds.h> 24 25 26 const char *ssb_core_name(u16 coreid) 27 { 28 switch (coreid) { 29 case SSB_DEV_CHIPCOMMON: 30 return "ChipCommon"; 31 case SSB_DEV_ILINE20: 32 return "ILine 20"; 33 case SSB_DEV_SDRAM: 34 return "SDRAM"; 35 case SSB_DEV_PCI: 36 return "PCI"; 37 case SSB_DEV_MIPS: 38 return "MIPS"; 39 case SSB_DEV_ETHERNET: 40 return "Fast Ethernet"; 41 case SSB_DEV_V90: 42 return "V90"; 43 case SSB_DEV_USB11_HOSTDEV: 44 return "USB 1.1 Hostdev"; 45 case SSB_DEV_ADSL: 46 return "ADSL"; 47 case SSB_DEV_ILINE100: 48 return "ILine 100"; 49 case SSB_DEV_IPSEC: 50 return "IPSEC"; 51 case SSB_DEV_PCMCIA: 52 return "PCMCIA"; 53 case SSB_DEV_INTERNAL_MEM: 54 return "Internal Memory"; 55 case SSB_DEV_MEMC_SDRAM: 56 return "MEMC SDRAM"; 57 case SSB_DEV_EXTIF: 58 return "EXTIF"; 59 case SSB_DEV_80211: 60 return "IEEE 802.11"; 61 case SSB_DEV_MIPS_3302: 62 return "MIPS 3302"; 63 case SSB_DEV_USB11_HOST: 64 return "USB 1.1 Host"; 65 case SSB_DEV_USB11_DEV: 66 return "USB 1.1 Device"; 67 case SSB_DEV_USB20_HOST: 68 return "USB 2.0 Host"; 69 case SSB_DEV_USB20_DEV: 70 return "USB 2.0 Device"; 71 case SSB_DEV_SDIO_HOST: 72 return "SDIO Host"; 73 case SSB_DEV_ROBOSWITCH: 74 return "Roboswitch"; 75 case SSB_DEV_PARA_ATA: 76 return "PATA"; 77 case SSB_DEV_SATA_XORDMA: 78 return "SATA XOR-DMA"; 79 case SSB_DEV_ETHERNET_GBIT: 80 return "GBit Ethernet"; 81 case SSB_DEV_PCIE: 82 return "PCI-E"; 83 case SSB_DEV_MIMO_PHY: 84 return "MIMO PHY"; 85 case SSB_DEV_SRAM_CTRLR: 86 return "SRAM Controller"; 87 case SSB_DEV_MINI_MACPHY: 88 return "Mini MACPHY"; 89 case SSB_DEV_ARM_1176: 90 return "ARM 1176"; 91 case SSB_DEV_ARM_7TDMI: 92 return "ARM 7TDMI"; 93 case SSB_DEV_ARM_CM3: 94 return "ARM Cortex M3"; 95 } 96 return "UNKNOWN"; 97 } 98 99 static u16 pcidev_to_chipid(struct pci_dev *pci_dev) 100 { 101 u16 chipid_fallback = 0; 102 103 switch (pci_dev->device) { 104 case 0x4301: 105 chipid_fallback = 0x4301; 106 break; 107 case 0x4305 ... 0x4307: 108 chipid_fallback = 0x4307; 109 break; 110 case 0x4403: 111 chipid_fallback = 0x4402; 112 break; 113 case 0x4610 ... 0x4615: 114 chipid_fallback = 0x4610; 115 break; 116 case 0x4710 ... 0x4715: 117 chipid_fallback = 0x4710; 118 break; 119 case 0x4320 ... 0x4325: 120 chipid_fallback = 0x4309; 121 break; 122 case PCI_DEVICE_ID_BCM4401: 123 case PCI_DEVICE_ID_BCM4401B0: 124 case PCI_DEVICE_ID_BCM4401B1: 125 chipid_fallback = 0x4401; 126 break; 127 default: 128 dev_err(&pci_dev->dev, "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 pr_err("CHIPID not in nrcores fallback list\n"); 155 } 156 157 return 1; 158 } 159 160 static u32 scan_read32(struct ssb_bus *bus, u8 current_coreidx, 161 u16 offset) 162 { 163 u32 lo, hi; 164 165 switch (bus->bustype) { 166 case SSB_BUSTYPE_SSB: 167 offset += current_coreidx * SSB_CORE_SIZE; 168 break; 169 case SSB_BUSTYPE_PCI: 170 break; 171 case SSB_BUSTYPE_PCMCIA: 172 if (offset >= 0x800) { 173 ssb_pcmcia_switch_segment(bus, 1); 174 offset -= 0x800; 175 } else 176 ssb_pcmcia_switch_segment(bus, 0); 177 lo = readw(bus->mmio + offset); 178 hi = readw(bus->mmio + offset + 2); 179 return lo | (hi << 16); 180 case SSB_BUSTYPE_SDIO: 181 offset += current_coreidx * SSB_CORE_SIZE; 182 return ssb_sdio_scan_read32(bus, offset); 183 } 184 return readl(bus->mmio + offset); 185 } 186 187 static int scan_switchcore(struct ssb_bus *bus, u8 coreidx) 188 { 189 switch (bus->bustype) { 190 case SSB_BUSTYPE_SSB: 191 break; 192 case SSB_BUSTYPE_PCI: 193 return ssb_pci_switch_coreidx(bus, coreidx); 194 case SSB_BUSTYPE_PCMCIA: 195 return ssb_pcmcia_switch_coreidx(bus, coreidx); 196 case SSB_BUSTYPE_SDIO: 197 return ssb_sdio_scan_switch_coreidx(bus, coreidx); 198 } 199 return 0; 200 } 201 202 void ssb_iounmap(struct ssb_bus *bus) 203 { 204 switch (bus->bustype) { 205 case SSB_BUSTYPE_SSB: 206 case SSB_BUSTYPE_PCMCIA: 207 iounmap(bus->mmio); 208 break; 209 case SSB_BUSTYPE_PCI: 210 #ifdef CONFIG_SSB_PCIHOST 211 pci_iounmap(bus->host_pci, bus->mmio); 212 #else 213 WARN_ON(1); /* Can't reach this code. */ 214 #endif 215 break; 216 case SSB_BUSTYPE_SDIO: 217 break; 218 } 219 bus->mmio = NULL; 220 bus->mapped_device = NULL; 221 } 222 223 static void __iomem *ssb_ioremap(struct ssb_bus *bus, 224 unsigned long baseaddr) 225 { 226 void __iomem *mmio = NULL; 227 228 switch (bus->bustype) { 229 case SSB_BUSTYPE_SSB: 230 /* Only map the first core for now. */ 231 /* fallthrough... */ 232 case SSB_BUSTYPE_PCMCIA: 233 mmio = ioremap(baseaddr, SSB_CORE_SIZE); 234 break; 235 case SSB_BUSTYPE_PCI: 236 #ifdef CONFIG_SSB_PCIHOST 237 mmio = pci_iomap(bus->host_pci, 0, ~0UL); 238 #else 239 WARN_ON(1); /* Can't reach this code. */ 240 #endif 241 break; 242 case SSB_BUSTYPE_SDIO: 243 /* Nothing to ioremap in the SDIO case, just fake it */ 244 mmio = (void __iomem *)baseaddr; 245 break; 246 } 247 248 return mmio; 249 } 250 251 static int we_support_multiple_80211_cores(struct ssb_bus *bus) 252 { 253 /* More than one 802.11 core is only supported by special chips. 254 * There are chips with two 802.11 cores, but with dangling 255 * pins on the second core. Be careful and reject them here. 256 */ 257 258 #ifdef CONFIG_SSB_PCIHOST 259 if (bus->bustype == SSB_BUSTYPE_PCI) { 260 if (bus->host_pci->vendor == PCI_VENDOR_ID_BROADCOM && 261 ((bus->host_pci->device == 0x4313) || 262 (bus->host_pci->device == 0x431A) || 263 (bus->host_pci->device == 0x4321) || 264 (bus->host_pci->device == 0x4324))) 265 return 1; 266 } 267 #endif /* CONFIG_SSB_PCIHOST */ 268 return 0; 269 } 270 271 int ssb_bus_scan(struct ssb_bus *bus, 272 unsigned long baseaddr) 273 { 274 int err = -ENOMEM; 275 void __iomem *mmio; 276 u32 idhi, cc, rev, tmp; 277 int dev_i, i; 278 struct ssb_device *dev; 279 int nr_80211_cores = 0; 280 281 mmio = ssb_ioremap(bus, baseaddr); 282 if (!mmio) 283 goto out; 284 bus->mmio = mmio; 285 286 err = scan_switchcore(bus, 0); /* Switch to first core */ 287 if (err) 288 goto err_unmap; 289 290 idhi = scan_read32(bus, 0, SSB_IDHIGH); 291 cc = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT; 292 rev = (idhi & SSB_IDHIGH_RCLO); 293 rev |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT; 294 295 bus->nr_devices = 0; 296 if (cc == SSB_DEV_CHIPCOMMON) { 297 tmp = scan_read32(bus, 0, SSB_CHIPCO_CHIPID); 298 299 bus->chip_id = (tmp & SSB_CHIPCO_IDMASK); 300 bus->chip_rev = (tmp & SSB_CHIPCO_REVMASK) >> 301 SSB_CHIPCO_REVSHIFT; 302 bus->chip_package = (tmp & SSB_CHIPCO_PACKMASK) >> 303 SSB_CHIPCO_PACKSHIFT; 304 if (rev >= 4) { 305 bus->nr_devices = (tmp & SSB_CHIPCO_NRCORESMASK) >> 306 SSB_CHIPCO_NRCORESSHIFT; 307 } 308 tmp = scan_read32(bus, 0, SSB_CHIPCO_CAP); 309 bus->chipco.capabilities = tmp; 310 } else { 311 if (bus->bustype == SSB_BUSTYPE_PCI) { 312 bus->chip_id = pcidev_to_chipid(bus->host_pci); 313 bus->chip_rev = bus->host_pci->revision; 314 bus->chip_package = 0; 315 } else { 316 bus->chip_id = 0x4710; 317 bus->chip_rev = 0; 318 bus->chip_package = 0; 319 } 320 } 321 pr_info("Found chip with id 0x%04X, rev 0x%02X and package 0x%02X\n", 322 bus->chip_id, bus->chip_rev, bus->chip_package); 323 if (!bus->nr_devices) 324 bus->nr_devices = chipid_to_nrcores(bus->chip_id); 325 if (bus->nr_devices > ARRAY_SIZE(bus->devices)) { 326 pr_err("More than %d ssb cores found (%d)\n", 327 SSB_MAX_NR_CORES, bus->nr_devices); 328 goto err_unmap; 329 } 330 if (bus->bustype == SSB_BUSTYPE_SSB) { 331 /* Now that we know the number of cores, 332 * remap the whole IO space for all cores. 333 */ 334 err = -ENOMEM; 335 iounmap(mmio); 336 mmio = ioremap(baseaddr, SSB_CORE_SIZE * bus->nr_devices); 337 if (!mmio) 338 goto out; 339 bus->mmio = mmio; 340 } 341 342 /* Fetch basic information about each core/device */ 343 for (i = 0, dev_i = 0; i < bus->nr_devices; i++) { 344 err = scan_switchcore(bus, i); 345 if (err) 346 goto err_unmap; 347 dev = &(bus->devices[dev_i]); 348 349 idhi = scan_read32(bus, i, SSB_IDHIGH); 350 dev->id.coreid = (idhi & SSB_IDHIGH_CC) >> SSB_IDHIGH_CC_SHIFT; 351 dev->id.revision = (idhi & SSB_IDHIGH_RCLO); 352 dev->id.revision |= (idhi & SSB_IDHIGH_RCHI) >> SSB_IDHIGH_RCHI_SHIFT; 353 dev->id.vendor = (idhi & SSB_IDHIGH_VC) >> SSB_IDHIGH_VC_SHIFT; 354 dev->core_index = i; 355 dev->bus = bus; 356 dev->ops = bus->ops; 357 358 pr_debug("Core %d found: %s (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 pr_debug("Ignoring additional 802.11 core\n"); 368 continue; 369 } 370 } 371 break; 372 case SSB_DEV_EXTIF: 373 #ifdef CONFIG_SSB_DRIVER_EXTIF 374 if (bus->extif.dev) { 375 pr_warn("WARNING: Multiple EXTIFs found\n"); 376 break; 377 } 378 bus->extif.dev = dev; 379 #endif /* CONFIG_SSB_DRIVER_EXTIF */ 380 break; 381 case SSB_DEV_CHIPCOMMON: 382 if (bus->chipco.dev) { 383 pr_warn("WARNING: Multiple ChipCommon found\n"); 384 break; 385 } 386 bus->chipco.dev = dev; 387 break; 388 case SSB_DEV_MIPS: 389 case SSB_DEV_MIPS_3302: 390 #ifdef CONFIG_SSB_DRIVER_MIPS 391 if (bus->mipscore.dev) { 392 pr_warn("WARNING: Multiple MIPS cores found\n"); 393 break; 394 } 395 bus->mipscore.dev = dev; 396 #endif /* CONFIG_SSB_DRIVER_MIPS */ 397 break; 398 case SSB_DEV_PCI: 399 case SSB_DEV_PCIE: 400 #ifdef CONFIG_SSB_DRIVER_PCICORE 401 if (bus->bustype == SSB_BUSTYPE_PCI) { 402 /* Ignore PCI cores on PCI-E cards. 403 * Ignore PCI-E cores on PCI cards. */ 404 if (dev->id.coreid == SSB_DEV_PCI) { 405 if (pci_is_pcie(bus->host_pci)) 406 continue; 407 } else { 408 if (!pci_is_pcie(bus->host_pci)) 409 continue; 410 } 411 } 412 if (bus->pcicore.dev) { 413 pr_warn("WARNING: Multiple PCI(E) cores found\n"); 414 break; 415 } 416 bus->pcicore.dev = dev; 417 #endif /* CONFIG_SSB_DRIVER_PCICORE */ 418 break; 419 case SSB_DEV_ETHERNET: 420 if (bus->bustype == SSB_BUSTYPE_PCI) { 421 if (bus->host_pci->vendor == PCI_VENDOR_ID_BROADCOM && 422 (bus->host_pci->device & 0xFF00) == 0x4300) { 423 /* This is a dangling ethernet core on a 424 * wireless device. Ignore it. */ 425 continue; 426 } 427 } 428 break; 429 default: 430 break; 431 } 432 433 dev_i++; 434 } 435 bus->nr_devices = dev_i; 436 437 err = 0; 438 out: 439 return err; 440 err_unmap: 441 ssb_iounmap(bus); 442 goto out; 443 } 444