1 /* 2 * Broadcom specific AMBA 3 * Bus subsystem 4 * 5 * Licensed under the GNU/GPL. See COPYING for details. 6 */ 7 8 #include "bcma_private.h" 9 #include <linux/module.h> 10 #include <linux/platform_device.h> 11 #include <linux/bcma/bcma.h> 12 #include <linux/slab.h> 13 14 MODULE_DESCRIPTION("Broadcom's specific AMBA driver"); 15 MODULE_LICENSE("GPL"); 16 17 /* contains the number the next bus should get. */ 18 static unsigned int bcma_bus_next_num = 0; 19 20 /* bcma_buses_mutex locks the bcma_bus_next_num */ 21 static DEFINE_MUTEX(bcma_buses_mutex); 22 23 static int bcma_bus_match(struct device *dev, struct device_driver *drv); 24 static int bcma_device_probe(struct device *dev); 25 static int bcma_device_remove(struct device *dev); 26 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env); 27 28 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf) 29 { 30 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 31 return sprintf(buf, "0x%03X\n", core->id.manuf); 32 } 33 static DEVICE_ATTR_RO(manuf); 34 35 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf) 36 { 37 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 38 return sprintf(buf, "0x%03X\n", core->id.id); 39 } 40 static DEVICE_ATTR_RO(id); 41 42 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf) 43 { 44 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 45 return sprintf(buf, "0x%02X\n", core->id.rev); 46 } 47 static DEVICE_ATTR_RO(rev); 48 49 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf) 50 { 51 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 52 return sprintf(buf, "0x%X\n", core->id.class); 53 } 54 static DEVICE_ATTR_RO(class); 55 56 static struct attribute *bcma_device_attrs[] = { 57 &dev_attr_manuf.attr, 58 &dev_attr_id.attr, 59 &dev_attr_rev.attr, 60 &dev_attr_class.attr, 61 NULL, 62 }; 63 ATTRIBUTE_GROUPS(bcma_device); 64 65 static struct bus_type bcma_bus_type = { 66 .name = "bcma", 67 .match = bcma_bus_match, 68 .probe = bcma_device_probe, 69 .remove = bcma_device_remove, 70 .uevent = bcma_device_uevent, 71 .dev_groups = bcma_device_groups, 72 }; 73 74 static u16 bcma_cc_core_id(struct bcma_bus *bus) 75 { 76 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706) 77 return BCMA_CORE_4706_CHIPCOMMON; 78 return BCMA_CORE_CHIPCOMMON; 79 } 80 81 struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid, 82 u8 unit) 83 { 84 struct bcma_device *core; 85 86 list_for_each_entry(core, &bus->cores, list) { 87 if (core->id.id == coreid && core->core_unit == unit) 88 return core; 89 } 90 return NULL; 91 } 92 EXPORT_SYMBOL_GPL(bcma_find_core_unit); 93 94 bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value, 95 int timeout) 96 { 97 unsigned long deadline = jiffies + timeout; 98 u32 val; 99 100 do { 101 val = bcma_read32(core, reg); 102 if ((val & mask) == value) 103 return true; 104 cpu_relax(); 105 udelay(10); 106 } while (!time_after_eq(jiffies, deadline)); 107 108 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg); 109 110 return false; 111 } 112 113 static void bcma_release_core_dev(struct device *dev) 114 { 115 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 116 if (core->io_addr) 117 iounmap(core->io_addr); 118 if (core->io_wrap) 119 iounmap(core->io_wrap); 120 kfree(core); 121 } 122 123 static int bcma_register_cores(struct bcma_bus *bus) 124 { 125 struct bcma_device *core; 126 int err, dev_id = 0; 127 128 list_for_each_entry(core, &bus->cores, list) { 129 /* We support that cores ourself */ 130 switch (core->id.id) { 131 case BCMA_CORE_4706_CHIPCOMMON: 132 case BCMA_CORE_CHIPCOMMON: 133 case BCMA_CORE_PCI: 134 case BCMA_CORE_PCIE: 135 case BCMA_CORE_PCIE2: 136 case BCMA_CORE_MIPS_74K: 137 case BCMA_CORE_4706_MAC_GBIT_COMMON: 138 continue; 139 } 140 141 /* Only first GMAC core on BCM4706 is connected and working */ 142 if (core->id.id == BCMA_CORE_4706_MAC_GBIT && 143 core->core_unit > 0) 144 continue; 145 146 core->dev.release = bcma_release_core_dev; 147 core->dev.bus = &bcma_bus_type; 148 dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id); 149 150 switch (bus->hosttype) { 151 case BCMA_HOSTTYPE_PCI: 152 core->dev.parent = &bus->host_pci->dev; 153 core->dma_dev = &bus->host_pci->dev; 154 core->irq = bus->host_pci->irq; 155 break; 156 case BCMA_HOSTTYPE_SOC: 157 core->dev.dma_mask = &core->dev.coherent_dma_mask; 158 core->dma_dev = &core->dev; 159 break; 160 case BCMA_HOSTTYPE_SDIO: 161 break; 162 } 163 164 err = device_register(&core->dev); 165 if (err) { 166 bcma_err(bus, 167 "Could not register dev for core 0x%03X\n", 168 core->id.id); 169 put_device(&core->dev); 170 continue; 171 } 172 core->dev_registered = true; 173 dev_id++; 174 } 175 176 #ifdef CONFIG_BCMA_DRIVER_MIPS 177 if (bus->drv_cc.pflash.present) { 178 err = platform_device_register(&bcma_pflash_dev); 179 if (err) 180 bcma_err(bus, "Error registering parallel flash\n"); 181 } 182 #endif 183 184 #ifdef CONFIG_BCMA_SFLASH 185 if (bus->drv_cc.sflash.present) { 186 err = platform_device_register(&bcma_sflash_dev); 187 if (err) 188 bcma_err(bus, "Error registering serial flash\n"); 189 } 190 #endif 191 192 #ifdef CONFIG_BCMA_NFLASH 193 if (bus->drv_cc.nflash.present) { 194 err = platform_device_register(&bcma_nflash_dev); 195 if (err) 196 bcma_err(bus, "Error registering NAND flash\n"); 197 } 198 #endif 199 err = bcma_gpio_init(&bus->drv_cc); 200 if (err == -ENOTSUPP) 201 bcma_debug(bus, "GPIO driver not activated\n"); 202 else if (err) 203 bcma_err(bus, "Error registering GPIO driver: %i\n", err); 204 205 if (bus->hosttype == BCMA_HOSTTYPE_SOC) { 206 err = bcma_chipco_watchdog_register(&bus->drv_cc); 207 if (err) 208 bcma_err(bus, "Error registering watchdog driver\n"); 209 } 210 211 return 0; 212 } 213 214 static void bcma_unregister_cores(struct bcma_bus *bus) 215 { 216 struct bcma_device *core, *tmp; 217 218 list_for_each_entry_safe(core, tmp, &bus->cores, list) { 219 list_del(&core->list); 220 if (core->dev_registered) 221 device_unregister(&core->dev); 222 } 223 if (bus->hosttype == BCMA_HOSTTYPE_SOC) 224 platform_device_unregister(bus->drv_cc.watchdog); 225 } 226 227 int bcma_bus_register(struct bcma_bus *bus) 228 { 229 int err; 230 struct bcma_device *core; 231 232 mutex_lock(&bcma_buses_mutex); 233 bus->num = bcma_bus_next_num++; 234 mutex_unlock(&bcma_buses_mutex); 235 236 /* Scan for devices (cores) */ 237 err = bcma_bus_scan(bus); 238 if (err) { 239 bcma_err(bus, "Failed to scan: %d\n", err); 240 return err; 241 } 242 243 /* Early init CC core */ 244 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 245 if (core) { 246 bus->drv_cc.core = core; 247 bcma_core_chipcommon_early_init(&bus->drv_cc); 248 } 249 250 /* Try to get SPROM */ 251 err = bcma_sprom_get(bus); 252 if (err == -ENOENT) { 253 bcma_err(bus, "No SPROM available\n"); 254 } else if (err) 255 bcma_err(bus, "Failed to get SPROM: %d\n", err); 256 257 /* Init CC core */ 258 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 259 if (core) { 260 bus->drv_cc.core = core; 261 bcma_core_chipcommon_init(&bus->drv_cc); 262 } 263 264 /* Init MIPS core */ 265 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 266 if (core) { 267 bus->drv_mips.core = core; 268 bcma_core_mips_init(&bus->drv_mips); 269 } 270 271 /* Init PCIE core */ 272 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0); 273 if (core) { 274 bus->drv_pci[0].core = core; 275 bcma_core_pci_init(&bus->drv_pci[0]); 276 } 277 278 /* Init PCIE core */ 279 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1); 280 if (core) { 281 bus->drv_pci[1].core = core; 282 bcma_core_pci_init(&bus->drv_pci[1]); 283 } 284 285 /* Init PCIe Gen 2 core */ 286 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0); 287 if (core) { 288 bus->drv_pcie2.core = core; 289 bcma_core_pcie2_init(&bus->drv_pcie2); 290 } 291 292 /* Init GBIT MAC COMMON core */ 293 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 294 if (core) { 295 bus->drv_gmac_cmn.core = core; 296 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn); 297 } 298 299 /* Register found cores */ 300 bcma_register_cores(bus); 301 302 bcma_info(bus, "Bus registered\n"); 303 304 return 0; 305 } 306 307 void bcma_bus_unregister(struct bcma_bus *bus) 308 { 309 struct bcma_device *cores[3]; 310 int err; 311 312 err = bcma_gpio_unregister(&bus->drv_cc); 313 if (err == -EBUSY) 314 bcma_err(bus, "Some GPIOs are still in use.\n"); 315 else if (err) 316 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err); 317 318 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 319 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE); 320 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 321 322 bcma_unregister_cores(bus); 323 324 kfree(cores[2]); 325 kfree(cores[1]); 326 kfree(cores[0]); 327 } 328 329 int __init bcma_bus_early_register(struct bcma_bus *bus, 330 struct bcma_device *core_cc, 331 struct bcma_device *core_mips) 332 { 333 int err; 334 struct bcma_device *core; 335 struct bcma_device_id match; 336 337 bcma_init_bus(bus); 338 339 match.manuf = BCMA_MANUF_BCM; 340 match.id = bcma_cc_core_id(bus); 341 match.class = BCMA_CL_SIM; 342 match.rev = BCMA_ANY_REV; 343 344 /* Scan for chip common core */ 345 err = bcma_bus_scan_early(bus, &match, core_cc); 346 if (err) { 347 bcma_err(bus, "Failed to scan for common core: %d\n", err); 348 return -1; 349 } 350 351 match.manuf = BCMA_MANUF_MIPS; 352 match.id = BCMA_CORE_MIPS_74K; 353 match.class = BCMA_CL_SIM; 354 match.rev = BCMA_ANY_REV; 355 356 /* Scan for mips core */ 357 err = bcma_bus_scan_early(bus, &match, core_mips); 358 if (err) { 359 bcma_err(bus, "Failed to scan for mips core: %d\n", err); 360 return -1; 361 } 362 363 /* Early init CC core */ 364 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 365 if (core) { 366 bus->drv_cc.core = core; 367 bcma_core_chipcommon_early_init(&bus->drv_cc); 368 } 369 370 /* Early init MIPS core */ 371 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 372 if (core) { 373 bus->drv_mips.core = core; 374 bcma_core_mips_early_init(&bus->drv_mips); 375 } 376 377 bcma_info(bus, "Early bus registered\n"); 378 379 return 0; 380 } 381 382 #ifdef CONFIG_PM 383 int bcma_bus_suspend(struct bcma_bus *bus) 384 { 385 struct bcma_device *core; 386 387 list_for_each_entry(core, &bus->cores, list) { 388 struct device_driver *drv = core->dev.driver; 389 if (drv) { 390 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 391 if (adrv->suspend) 392 adrv->suspend(core); 393 } 394 } 395 return 0; 396 } 397 398 int bcma_bus_resume(struct bcma_bus *bus) 399 { 400 struct bcma_device *core; 401 402 /* Init CC core */ 403 if (bus->drv_cc.core) { 404 bus->drv_cc.setup_done = false; 405 bcma_core_chipcommon_init(&bus->drv_cc); 406 } 407 408 list_for_each_entry(core, &bus->cores, list) { 409 struct device_driver *drv = core->dev.driver; 410 if (drv) { 411 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 412 if (adrv->resume) 413 adrv->resume(core); 414 } 415 } 416 417 return 0; 418 } 419 #endif 420 421 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner) 422 { 423 drv->drv.name = drv->name; 424 drv->drv.bus = &bcma_bus_type; 425 drv->drv.owner = owner; 426 427 return driver_register(&drv->drv); 428 } 429 EXPORT_SYMBOL_GPL(__bcma_driver_register); 430 431 void bcma_driver_unregister(struct bcma_driver *drv) 432 { 433 driver_unregister(&drv->drv); 434 } 435 EXPORT_SYMBOL_GPL(bcma_driver_unregister); 436 437 static int bcma_bus_match(struct device *dev, struct device_driver *drv) 438 { 439 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 440 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 441 const struct bcma_device_id *cid = &core->id; 442 const struct bcma_device_id *did; 443 444 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) { 445 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) && 446 (did->id == cid->id || did->id == BCMA_ANY_ID) && 447 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) && 448 (did->class == cid->class || did->class == BCMA_ANY_CLASS)) 449 return 1; 450 } 451 return 0; 452 } 453 454 static int bcma_device_probe(struct device *dev) 455 { 456 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 457 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 458 drv); 459 int err = 0; 460 461 if (adrv->probe) 462 err = adrv->probe(core); 463 464 return err; 465 } 466 467 static int bcma_device_remove(struct device *dev) 468 { 469 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 470 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 471 drv); 472 473 if (adrv->remove) 474 adrv->remove(core); 475 476 return 0; 477 } 478 479 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env) 480 { 481 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 482 483 return add_uevent_var(env, 484 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X", 485 core->id.manuf, core->id.id, 486 core->id.rev, core->id.class); 487 } 488 489 static int __init bcma_modinit(void) 490 { 491 int err; 492 493 err = bus_register(&bcma_bus_type); 494 if (err) 495 return err; 496 497 #ifdef CONFIG_BCMA_HOST_PCI 498 err = bcma_host_pci_init(); 499 if (err) { 500 pr_err("PCI host initialization failed\n"); 501 err = 0; 502 } 503 #endif 504 505 return err; 506 } 507 fs_initcall(bcma_modinit); 508 509 static void __exit bcma_modexit(void) 510 { 511 #ifdef CONFIG_BCMA_HOST_PCI 512 bcma_host_pci_exit(); 513 #endif 514 bus_unregister(&bcma_bus_type); 515 } 516 module_exit(bcma_modexit) 517