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(struct bcma_bus *bus, u16 coreid) 82 { 83 struct bcma_device *core; 84 85 list_for_each_entry(core, &bus->cores, list) { 86 if (core->id.id == coreid) 87 return core; 88 } 89 return NULL; 90 } 91 EXPORT_SYMBOL_GPL(bcma_find_core); 92 93 struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid, 94 u8 unit) 95 { 96 struct bcma_device *core; 97 98 list_for_each_entry(core, &bus->cores, list) { 99 if (core->id.id == coreid && core->core_unit == unit) 100 return core; 101 } 102 return NULL; 103 } 104 105 bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value, 106 int timeout) 107 { 108 unsigned long deadline = jiffies + timeout; 109 u32 val; 110 111 do { 112 val = bcma_read32(core, reg); 113 if ((val & mask) == value) 114 return true; 115 cpu_relax(); 116 udelay(10); 117 } while (!time_after_eq(jiffies, deadline)); 118 119 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg); 120 121 return false; 122 } 123 124 static void bcma_release_core_dev(struct device *dev) 125 { 126 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 127 if (core->io_addr) 128 iounmap(core->io_addr); 129 if (core->io_wrap) 130 iounmap(core->io_wrap); 131 kfree(core); 132 } 133 134 static int bcma_register_cores(struct bcma_bus *bus) 135 { 136 struct bcma_device *core; 137 int err, dev_id = 0; 138 139 list_for_each_entry(core, &bus->cores, list) { 140 /* We support that cores ourself */ 141 switch (core->id.id) { 142 case BCMA_CORE_4706_CHIPCOMMON: 143 case BCMA_CORE_CHIPCOMMON: 144 case BCMA_CORE_PCI: 145 case BCMA_CORE_PCIE: 146 case BCMA_CORE_MIPS_74K: 147 case BCMA_CORE_4706_MAC_GBIT_COMMON: 148 continue; 149 } 150 151 /* Only first GMAC core on BCM4706 is connected and working */ 152 if (core->id.id == BCMA_CORE_4706_MAC_GBIT && 153 core->core_unit > 0) 154 continue; 155 156 core->dev.release = bcma_release_core_dev; 157 core->dev.bus = &bcma_bus_type; 158 dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id); 159 160 switch (bus->hosttype) { 161 case BCMA_HOSTTYPE_PCI: 162 core->dev.parent = &bus->host_pci->dev; 163 core->dma_dev = &bus->host_pci->dev; 164 core->irq = bus->host_pci->irq; 165 break; 166 case BCMA_HOSTTYPE_SOC: 167 core->dev.dma_mask = &core->dev.coherent_dma_mask; 168 core->dma_dev = &core->dev; 169 break; 170 case BCMA_HOSTTYPE_SDIO: 171 break; 172 } 173 174 err = device_register(&core->dev); 175 if (err) { 176 bcma_err(bus, 177 "Could not register dev for core 0x%03X\n", 178 core->id.id); 179 continue; 180 } 181 core->dev_registered = true; 182 dev_id++; 183 } 184 185 #ifdef CONFIG_BCMA_DRIVER_MIPS 186 if (bus->drv_cc.pflash.present) { 187 err = platform_device_register(&bcma_pflash_dev); 188 if (err) 189 bcma_err(bus, "Error registering parallel flash\n"); 190 } 191 #endif 192 193 #ifdef CONFIG_BCMA_SFLASH 194 if (bus->drv_cc.sflash.present) { 195 err = platform_device_register(&bcma_sflash_dev); 196 if (err) 197 bcma_err(bus, "Error registering serial flash\n"); 198 } 199 #endif 200 201 #ifdef CONFIG_BCMA_NFLASH 202 if (bus->drv_cc.nflash.present) { 203 err = platform_device_register(&bcma_nflash_dev); 204 if (err) 205 bcma_err(bus, "Error registering NAND flash\n"); 206 } 207 #endif 208 err = bcma_gpio_init(&bus->drv_cc); 209 if (err == -ENOTSUPP) 210 bcma_debug(bus, "GPIO driver not activated\n"); 211 else if (err) 212 bcma_err(bus, "Error registering GPIO driver: %i\n", err); 213 214 if (bus->hosttype == BCMA_HOSTTYPE_SOC) { 215 err = bcma_chipco_watchdog_register(&bus->drv_cc); 216 if (err) 217 bcma_err(bus, "Error registering watchdog driver\n"); 218 } 219 220 return 0; 221 } 222 223 static void bcma_unregister_cores(struct bcma_bus *bus) 224 { 225 struct bcma_device *core, *tmp; 226 227 list_for_each_entry_safe(core, tmp, &bus->cores, list) { 228 list_del(&core->list); 229 if (core->dev_registered) 230 device_unregister(&core->dev); 231 } 232 if (bus->hosttype == BCMA_HOSTTYPE_SOC) 233 platform_device_unregister(bus->drv_cc.watchdog); 234 } 235 236 int bcma_bus_register(struct bcma_bus *bus) 237 { 238 int err; 239 struct bcma_device *core; 240 241 mutex_lock(&bcma_buses_mutex); 242 bus->num = bcma_bus_next_num++; 243 mutex_unlock(&bcma_buses_mutex); 244 245 /* Scan for devices (cores) */ 246 err = bcma_bus_scan(bus); 247 if (err) { 248 bcma_err(bus, "Failed to scan: %d\n", err); 249 return err; 250 } 251 252 /* Early init CC core */ 253 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 254 if (core) { 255 bus->drv_cc.core = core; 256 bcma_core_chipcommon_early_init(&bus->drv_cc); 257 } 258 259 /* Try to get SPROM */ 260 err = bcma_sprom_get(bus); 261 if (err == -ENOENT) { 262 bcma_err(bus, "No SPROM available\n"); 263 } else if (err) 264 bcma_err(bus, "Failed to get SPROM: %d\n", err); 265 266 /* Init CC core */ 267 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 268 if (core) { 269 bus->drv_cc.core = core; 270 bcma_core_chipcommon_init(&bus->drv_cc); 271 } 272 273 /* Init MIPS core */ 274 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 275 if (core) { 276 bus->drv_mips.core = core; 277 bcma_core_mips_init(&bus->drv_mips); 278 } 279 280 /* Init PCIE core */ 281 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0); 282 if (core) { 283 bus->drv_pci[0].core = core; 284 bcma_core_pci_init(&bus->drv_pci[0]); 285 } 286 287 /* Init PCIE core */ 288 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1); 289 if (core) { 290 bus->drv_pci[1].core = core; 291 bcma_core_pci_init(&bus->drv_pci[1]); 292 } 293 294 /* Init GBIT MAC COMMON core */ 295 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 296 if (core) { 297 bus->drv_gmac_cmn.core = core; 298 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn); 299 } 300 301 /* Register found cores */ 302 bcma_register_cores(bus); 303 304 bcma_info(bus, "Bus registered\n"); 305 306 return 0; 307 } 308 309 void bcma_bus_unregister(struct bcma_bus *bus) 310 { 311 struct bcma_device *cores[3]; 312 int err; 313 314 err = bcma_gpio_unregister(&bus->drv_cc); 315 if (err == -EBUSY) 316 bcma_err(bus, "Some GPIOs are still in use.\n"); 317 else if (err) 318 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err); 319 320 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 321 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE); 322 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 323 324 bcma_unregister_cores(bus); 325 326 kfree(cores[2]); 327 kfree(cores[1]); 328 kfree(cores[0]); 329 } 330 331 int __init bcma_bus_early_register(struct bcma_bus *bus, 332 struct bcma_device *core_cc, 333 struct bcma_device *core_mips) 334 { 335 int err; 336 struct bcma_device *core; 337 struct bcma_device_id match; 338 339 bcma_init_bus(bus); 340 341 match.manuf = BCMA_MANUF_BCM; 342 match.id = bcma_cc_core_id(bus); 343 match.class = BCMA_CL_SIM; 344 match.rev = BCMA_ANY_REV; 345 346 /* Scan for chip common core */ 347 err = bcma_bus_scan_early(bus, &match, core_cc); 348 if (err) { 349 bcma_err(bus, "Failed to scan for common core: %d\n", err); 350 return -1; 351 } 352 353 match.manuf = BCMA_MANUF_MIPS; 354 match.id = BCMA_CORE_MIPS_74K; 355 match.class = BCMA_CL_SIM; 356 match.rev = BCMA_ANY_REV; 357 358 /* Scan for mips core */ 359 err = bcma_bus_scan_early(bus, &match, core_mips); 360 if (err) { 361 bcma_err(bus, "Failed to scan for mips core: %d\n", err); 362 return -1; 363 } 364 365 /* Early init CC core */ 366 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 367 if (core) { 368 bus->drv_cc.core = core; 369 bcma_core_chipcommon_early_init(&bus->drv_cc); 370 } 371 372 /* Early init MIPS core */ 373 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 374 if (core) { 375 bus->drv_mips.core = core; 376 bcma_core_mips_early_init(&bus->drv_mips); 377 } 378 379 bcma_info(bus, "Early bus registered\n"); 380 381 return 0; 382 } 383 384 #ifdef CONFIG_PM 385 int bcma_bus_suspend(struct bcma_bus *bus) 386 { 387 struct bcma_device *core; 388 389 list_for_each_entry(core, &bus->cores, list) { 390 struct device_driver *drv = core->dev.driver; 391 if (drv) { 392 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 393 if (adrv->suspend) 394 adrv->suspend(core); 395 } 396 } 397 return 0; 398 } 399 400 int bcma_bus_resume(struct bcma_bus *bus) 401 { 402 struct bcma_device *core; 403 404 /* Init CC core */ 405 if (bus->drv_cc.core) { 406 bus->drv_cc.setup_done = false; 407 bcma_core_chipcommon_init(&bus->drv_cc); 408 } 409 410 list_for_each_entry(core, &bus->cores, list) { 411 struct device_driver *drv = core->dev.driver; 412 if (drv) { 413 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 414 if (adrv->resume) 415 adrv->resume(core); 416 } 417 } 418 419 return 0; 420 } 421 #endif 422 423 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner) 424 { 425 drv->drv.name = drv->name; 426 drv->drv.bus = &bcma_bus_type; 427 drv->drv.owner = owner; 428 429 return driver_register(&drv->drv); 430 } 431 EXPORT_SYMBOL_GPL(__bcma_driver_register); 432 433 void bcma_driver_unregister(struct bcma_driver *drv) 434 { 435 driver_unregister(&drv->drv); 436 } 437 EXPORT_SYMBOL_GPL(bcma_driver_unregister); 438 439 static int bcma_bus_match(struct device *dev, struct device_driver *drv) 440 { 441 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 442 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 443 const struct bcma_device_id *cid = &core->id; 444 const struct bcma_device_id *did; 445 446 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) { 447 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) && 448 (did->id == cid->id || did->id == BCMA_ANY_ID) && 449 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) && 450 (did->class == cid->class || did->class == BCMA_ANY_CLASS)) 451 return 1; 452 } 453 return 0; 454 } 455 456 static int bcma_device_probe(struct device *dev) 457 { 458 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 459 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 460 drv); 461 int err = 0; 462 463 if (adrv->probe) 464 err = adrv->probe(core); 465 466 return err; 467 } 468 469 static int bcma_device_remove(struct device *dev) 470 { 471 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 472 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 473 drv); 474 475 if (adrv->remove) 476 adrv->remove(core); 477 478 return 0; 479 } 480 481 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env) 482 { 483 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 484 485 return add_uevent_var(env, 486 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X", 487 core->id.manuf, core->id.id, 488 core->id.rev, core->id.class); 489 } 490 491 static int __init bcma_modinit(void) 492 { 493 int err; 494 495 err = bus_register(&bcma_bus_type); 496 if (err) 497 return err; 498 499 #ifdef CONFIG_BCMA_HOST_PCI 500 err = bcma_host_pci_init(); 501 if (err) { 502 pr_err("PCI host initialization failed\n"); 503 err = 0; 504 } 505 #endif 506 507 return err; 508 } 509 fs_initcall(bcma_modinit); 510 511 static void __exit bcma_modexit(void) 512 { 513 #ifdef CONFIG_BCMA_HOST_PCI 514 bcma_host_pci_exit(); 515 #endif 516 bus_unregister(&bcma_bus_type); 517 } 518 module_exit(bcma_modexit) 519