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_MIPS_74K: 136 case BCMA_CORE_4706_MAC_GBIT_COMMON: 137 continue; 138 } 139 140 /* Only first GMAC core on BCM4706 is connected and working */ 141 if (core->id.id == BCMA_CORE_4706_MAC_GBIT && 142 core->core_unit > 0) 143 continue; 144 145 core->dev.release = bcma_release_core_dev; 146 core->dev.bus = &bcma_bus_type; 147 dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id); 148 149 switch (bus->hosttype) { 150 case BCMA_HOSTTYPE_PCI: 151 core->dev.parent = &bus->host_pci->dev; 152 core->dma_dev = &bus->host_pci->dev; 153 core->irq = bus->host_pci->irq; 154 break; 155 case BCMA_HOSTTYPE_SOC: 156 core->dev.dma_mask = &core->dev.coherent_dma_mask; 157 core->dma_dev = &core->dev; 158 break; 159 case BCMA_HOSTTYPE_SDIO: 160 break; 161 } 162 163 err = device_register(&core->dev); 164 if (err) { 165 bcma_err(bus, 166 "Could not register dev for core 0x%03X\n", 167 core->id.id); 168 put_device(&core->dev); 169 continue; 170 } 171 core->dev_registered = true; 172 dev_id++; 173 } 174 175 #ifdef CONFIG_BCMA_DRIVER_MIPS 176 if (bus->drv_cc.pflash.present) { 177 err = platform_device_register(&bcma_pflash_dev); 178 if (err) 179 bcma_err(bus, "Error registering parallel flash\n"); 180 } 181 #endif 182 183 #ifdef CONFIG_BCMA_SFLASH 184 if (bus->drv_cc.sflash.present) { 185 err = platform_device_register(&bcma_sflash_dev); 186 if (err) 187 bcma_err(bus, "Error registering serial flash\n"); 188 } 189 #endif 190 191 #ifdef CONFIG_BCMA_NFLASH 192 if (bus->drv_cc.nflash.present) { 193 err = platform_device_register(&bcma_nflash_dev); 194 if (err) 195 bcma_err(bus, "Error registering NAND flash\n"); 196 } 197 #endif 198 err = bcma_gpio_init(&bus->drv_cc); 199 if (err == -ENOTSUPP) 200 bcma_debug(bus, "GPIO driver not activated\n"); 201 else if (err) 202 bcma_err(bus, "Error registering GPIO driver: %i\n", err); 203 204 if (bus->hosttype == BCMA_HOSTTYPE_SOC) { 205 err = bcma_chipco_watchdog_register(&bus->drv_cc); 206 if (err) 207 bcma_err(bus, "Error registering watchdog driver\n"); 208 } 209 210 return 0; 211 } 212 213 static void bcma_unregister_cores(struct bcma_bus *bus) 214 { 215 struct bcma_device *core, *tmp; 216 217 list_for_each_entry_safe(core, tmp, &bus->cores, list) { 218 list_del(&core->list); 219 if (core->dev_registered) 220 device_unregister(&core->dev); 221 } 222 if (bus->hosttype == BCMA_HOSTTYPE_SOC) 223 platform_device_unregister(bus->drv_cc.watchdog); 224 } 225 226 int bcma_bus_register(struct bcma_bus *bus) 227 { 228 int err; 229 struct bcma_device *core; 230 231 mutex_lock(&bcma_buses_mutex); 232 bus->num = bcma_bus_next_num++; 233 mutex_unlock(&bcma_buses_mutex); 234 235 /* Scan for devices (cores) */ 236 err = bcma_bus_scan(bus); 237 if (err) { 238 bcma_err(bus, "Failed to scan: %d\n", err); 239 return err; 240 } 241 242 /* Early init CC core */ 243 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 244 if (core) { 245 bus->drv_cc.core = core; 246 bcma_core_chipcommon_early_init(&bus->drv_cc); 247 } 248 249 /* Try to get SPROM */ 250 err = bcma_sprom_get(bus); 251 if (err == -ENOENT) { 252 bcma_err(bus, "No SPROM available\n"); 253 } else if (err) 254 bcma_err(bus, "Failed to get SPROM: %d\n", err); 255 256 /* Init CC core */ 257 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 258 if (core) { 259 bus->drv_cc.core = core; 260 bcma_core_chipcommon_init(&bus->drv_cc); 261 } 262 263 /* Init MIPS core */ 264 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 265 if (core) { 266 bus->drv_mips.core = core; 267 bcma_core_mips_init(&bus->drv_mips); 268 } 269 270 /* Init PCIE core */ 271 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0); 272 if (core) { 273 bus->drv_pci[0].core = core; 274 bcma_core_pci_init(&bus->drv_pci[0]); 275 } 276 277 /* Init PCIE core */ 278 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1); 279 if (core) { 280 bus->drv_pci[1].core = core; 281 bcma_core_pci_init(&bus->drv_pci[1]); 282 } 283 284 /* Init GBIT MAC COMMON core */ 285 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 286 if (core) { 287 bus->drv_gmac_cmn.core = core; 288 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn); 289 } 290 291 /* Register found cores */ 292 bcma_register_cores(bus); 293 294 bcma_info(bus, "Bus registered\n"); 295 296 return 0; 297 } 298 299 void bcma_bus_unregister(struct bcma_bus *bus) 300 { 301 struct bcma_device *cores[3]; 302 int err; 303 304 err = bcma_gpio_unregister(&bus->drv_cc); 305 if (err == -EBUSY) 306 bcma_err(bus, "Some GPIOs are still in use.\n"); 307 else if (err) 308 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err); 309 310 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 311 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE); 312 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 313 314 bcma_unregister_cores(bus); 315 316 kfree(cores[2]); 317 kfree(cores[1]); 318 kfree(cores[0]); 319 } 320 321 int __init bcma_bus_early_register(struct bcma_bus *bus, 322 struct bcma_device *core_cc, 323 struct bcma_device *core_mips) 324 { 325 int err; 326 struct bcma_device *core; 327 struct bcma_device_id match; 328 329 bcma_init_bus(bus); 330 331 match.manuf = BCMA_MANUF_BCM; 332 match.id = bcma_cc_core_id(bus); 333 match.class = BCMA_CL_SIM; 334 match.rev = BCMA_ANY_REV; 335 336 /* Scan for chip common core */ 337 err = bcma_bus_scan_early(bus, &match, core_cc); 338 if (err) { 339 bcma_err(bus, "Failed to scan for common core: %d\n", err); 340 return -1; 341 } 342 343 match.manuf = BCMA_MANUF_MIPS; 344 match.id = BCMA_CORE_MIPS_74K; 345 match.class = BCMA_CL_SIM; 346 match.rev = BCMA_ANY_REV; 347 348 /* Scan for mips core */ 349 err = bcma_bus_scan_early(bus, &match, core_mips); 350 if (err) { 351 bcma_err(bus, "Failed to scan for mips core: %d\n", err); 352 return -1; 353 } 354 355 /* Early init CC core */ 356 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 357 if (core) { 358 bus->drv_cc.core = core; 359 bcma_core_chipcommon_early_init(&bus->drv_cc); 360 } 361 362 /* Early init MIPS core */ 363 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 364 if (core) { 365 bus->drv_mips.core = core; 366 bcma_core_mips_early_init(&bus->drv_mips); 367 } 368 369 bcma_info(bus, "Early bus registered\n"); 370 371 return 0; 372 } 373 374 #ifdef CONFIG_PM 375 int bcma_bus_suspend(struct bcma_bus *bus) 376 { 377 struct bcma_device *core; 378 379 list_for_each_entry(core, &bus->cores, list) { 380 struct device_driver *drv = core->dev.driver; 381 if (drv) { 382 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 383 if (adrv->suspend) 384 adrv->suspend(core); 385 } 386 } 387 return 0; 388 } 389 390 int bcma_bus_resume(struct bcma_bus *bus) 391 { 392 struct bcma_device *core; 393 394 /* Init CC core */ 395 if (bus->drv_cc.core) { 396 bus->drv_cc.setup_done = false; 397 bcma_core_chipcommon_init(&bus->drv_cc); 398 } 399 400 list_for_each_entry(core, &bus->cores, list) { 401 struct device_driver *drv = core->dev.driver; 402 if (drv) { 403 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 404 if (adrv->resume) 405 adrv->resume(core); 406 } 407 } 408 409 return 0; 410 } 411 #endif 412 413 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner) 414 { 415 drv->drv.name = drv->name; 416 drv->drv.bus = &bcma_bus_type; 417 drv->drv.owner = owner; 418 419 return driver_register(&drv->drv); 420 } 421 EXPORT_SYMBOL_GPL(__bcma_driver_register); 422 423 void bcma_driver_unregister(struct bcma_driver *drv) 424 { 425 driver_unregister(&drv->drv); 426 } 427 EXPORT_SYMBOL_GPL(bcma_driver_unregister); 428 429 static int bcma_bus_match(struct device *dev, struct device_driver *drv) 430 { 431 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 432 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 433 const struct bcma_device_id *cid = &core->id; 434 const struct bcma_device_id *did; 435 436 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) { 437 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) && 438 (did->id == cid->id || did->id == BCMA_ANY_ID) && 439 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) && 440 (did->class == cid->class || did->class == BCMA_ANY_CLASS)) 441 return 1; 442 } 443 return 0; 444 } 445 446 static int bcma_device_probe(struct device *dev) 447 { 448 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 449 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 450 drv); 451 int err = 0; 452 453 if (adrv->probe) 454 err = adrv->probe(core); 455 456 return err; 457 } 458 459 static int bcma_device_remove(struct device *dev) 460 { 461 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 462 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 463 drv); 464 465 if (adrv->remove) 466 adrv->remove(core); 467 468 return 0; 469 } 470 471 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env) 472 { 473 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 474 475 return add_uevent_var(env, 476 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X", 477 core->id.manuf, core->id.id, 478 core->id.rev, core->id.class); 479 } 480 481 static int __init bcma_modinit(void) 482 { 483 int err; 484 485 err = bus_register(&bcma_bus_type); 486 if (err) 487 return err; 488 489 #ifdef CONFIG_BCMA_HOST_PCI 490 err = bcma_host_pci_init(); 491 if (err) { 492 pr_err("PCI host initialization failed\n"); 493 err = 0; 494 } 495 #endif 496 497 return err; 498 } 499 fs_initcall(bcma_modinit); 500 501 static void __exit bcma_modexit(void) 502 { 503 #ifdef CONFIG_BCMA_HOST_PCI 504 bcma_host_pci_exit(); 505 #endif 506 bus_unregister(&bcma_bus_type); 507 } 508 module_exit(bcma_modexit) 509