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 ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf) 34 { 35 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 36 return sprintf(buf, "0x%03X\n", core->id.id); 37 } 38 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf) 39 { 40 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 41 return sprintf(buf, "0x%02X\n", core->id.rev); 42 } 43 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf) 44 { 45 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 46 return sprintf(buf, "0x%X\n", core->id.class); 47 } 48 static struct device_attribute bcma_device_attrs[] = { 49 __ATTR_RO(manuf), 50 __ATTR_RO(id), 51 __ATTR_RO(rev), 52 __ATTR_RO(class), 53 __ATTR_NULL, 54 }; 55 56 static struct bus_type bcma_bus_type = { 57 .name = "bcma", 58 .match = bcma_bus_match, 59 .probe = bcma_device_probe, 60 .remove = bcma_device_remove, 61 .uevent = bcma_device_uevent, 62 .dev_attrs = bcma_device_attrs, 63 }; 64 65 static u16 bcma_cc_core_id(struct bcma_bus *bus) 66 { 67 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706) 68 return BCMA_CORE_4706_CHIPCOMMON; 69 return BCMA_CORE_CHIPCOMMON; 70 } 71 72 struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid) 73 { 74 struct bcma_device *core; 75 76 list_for_each_entry(core, &bus->cores, list) { 77 if (core->id.id == coreid) 78 return core; 79 } 80 return NULL; 81 } 82 EXPORT_SYMBOL_GPL(bcma_find_core); 83 84 struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid, 85 u8 unit) 86 { 87 struct bcma_device *core; 88 89 list_for_each_entry(core, &bus->cores, list) { 90 if (core->id.id == coreid && core->core_unit == unit) 91 return core; 92 } 93 return NULL; 94 } 95 96 bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value, 97 int timeout) 98 { 99 unsigned long deadline = jiffies + timeout; 100 u32 val; 101 102 do { 103 val = bcma_read32(core, reg); 104 if ((val & mask) == value) 105 return true; 106 cpu_relax(); 107 udelay(10); 108 } while (!time_after_eq(jiffies, deadline)); 109 110 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg); 111 112 return false; 113 } 114 115 static void bcma_release_core_dev(struct device *dev) 116 { 117 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 118 if (core->io_addr) 119 iounmap(core->io_addr); 120 if (core->io_wrap) 121 iounmap(core->io_wrap); 122 kfree(core); 123 } 124 125 static int bcma_register_cores(struct bcma_bus *bus) 126 { 127 struct bcma_device *core; 128 int err, dev_id = 0; 129 130 list_for_each_entry(core, &bus->cores, list) { 131 /* We support that cores ourself */ 132 switch (core->id.id) { 133 case BCMA_CORE_4706_CHIPCOMMON: 134 case BCMA_CORE_CHIPCOMMON: 135 case BCMA_CORE_PCI: 136 case BCMA_CORE_PCIE: 137 case BCMA_CORE_MIPS_74K: 138 case BCMA_CORE_4706_MAC_GBIT_COMMON: 139 continue; 140 } 141 142 /* Only first GMAC core on BCM4706 is connected and working */ 143 if (core->id.id == BCMA_CORE_4706_MAC_GBIT && 144 core->core_unit > 0) 145 continue; 146 147 core->dev.release = bcma_release_core_dev; 148 core->dev.bus = &bcma_bus_type; 149 dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id); 150 151 switch (bus->hosttype) { 152 case BCMA_HOSTTYPE_PCI: 153 core->dev.parent = &bus->host_pci->dev; 154 core->dma_dev = &bus->host_pci->dev; 155 core->irq = bus->host_pci->irq; 156 break; 157 case BCMA_HOSTTYPE_SOC: 158 core->dev.dma_mask = &core->dev.coherent_dma_mask; 159 core->dma_dev = &core->dev; 160 break; 161 case BCMA_HOSTTYPE_SDIO: 162 break; 163 } 164 165 err = device_register(&core->dev); 166 if (err) { 167 bcma_err(bus, 168 "Could not register dev for core 0x%03X\n", 169 core->id.id); 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 GBIT MAC COMMON core */ 286 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 287 if (core) { 288 bus->drv_gmac_cmn.core = core; 289 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn); 290 } 291 292 /* Register found cores */ 293 bcma_register_cores(bus); 294 295 bcma_info(bus, "Bus registered\n"); 296 297 return 0; 298 } 299 300 void bcma_bus_unregister(struct bcma_bus *bus) 301 { 302 struct bcma_device *cores[3]; 303 int err; 304 305 err = bcma_gpio_unregister(&bus->drv_cc); 306 if (err == -EBUSY) 307 bcma_err(bus, "Some GPIOs are still in use.\n"); 308 else if (err) 309 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err); 310 311 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 312 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE); 313 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 314 315 bcma_unregister_cores(bus); 316 317 kfree(cores[2]); 318 kfree(cores[1]); 319 kfree(cores[0]); 320 } 321 322 int __init bcma_bus_early_register(struct bcma_bus *bus, 323 struct bcma_device *core_cc, 324 struct bcma_device *core_mips) 325 { 326 int err; 327 struct bcma_device *core; 328 struct bcma_device_id match; 329 330 bcma_init_bus(bus); 331 332 match.manuf = BCMA_MANUF_BCM; 333 match.id = bcma_cc_core_id(bus); 334 match.class = BCMA_CL_SIM; 335 match.rev = BCMA_ANY_REV; 336 337 /* Scan for chip common core */ 338 err = bcma_bus_scan_early(bus, &match, core_cc); 339 if (err) { 340 bcma_err(bus, "Failed to scan for common core: %d\n", err); 341 return -1; 342 } 343 344 match.manuf = BCMA_MANUF_MIPS; 345 match.id = BCMA_CORE_MIPS_74K; 346 match.class = BCMA_CL_SIM; 347 match.rev = BCMA_ANY_REV; 348 349 /* Scan for mips core */ 350 err = bcma_bus_scan_early(bus, &match, core_mips); 351 if (err) { 352 bcma_err(bus, "Failed to scan for mips core: %d\n", err); 353 return -1; 354 } 355 356 /* Early init CC core */ 357 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 358 if (core) { 359 bus->drv_cc.core = core; 360 bcma_core_chipcommon_early_init(&bus->drv_cc); 361 } 362 363 /* Early init MIPS core */ 364 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 365 if (core) { 366 bus->drv_mips.core = core; 367 bcma_core_mips_early_init(&bus->drv_mips); 368 } 369 370 bcma_info(bus, "Early bus registered\n"); 371 372 return 0; 373 } 374 375 #ifdef CONFIG_PM 376 int bcma_bus_suspend(struct bcma_bus *bus) 377 { 378 struct bcma_device *core; 379 380 list_for_each_entry(core, &bus->cores, list) { 381 struct device_driver *drv = core->dev.driver; 382 if (drv) { 383 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 384 if (adrv->suspend) 385 adrv->suspend(core); 386 } 387 } 388 return 0; 389 } 390 391 int bcma_bus_resume(struct bcma_bus *bus) 392 { 393 struct bcma_device *core; 394 395 /* Init CC core */ 396 if (bus->drv_cc.core) { 397 bus->drv_cc.setup_done = false; 398 bcma_core_chipcommon_init(&bus->drv_cc); 399 } 400 401 list_for_each_entry(core, &bus->cores, list) { 402 struct device_driver *drv = core->dev.driver; 403 if (drv) { 404 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 405 if (adrv->resume) 406 adrv->resume(core); 407 } 408 } 409 410 return 0; 411 } 412 #endif 413 414 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner) 415 { 416 drv->drv.name = drv->name; 417 drv->drv.bus = &bcma_bus_type; 418 drv->drv.owner = owner; 419 420 return driver_register(&drv->drv); 421 } 422 EXPORT_SYMBOL_GPL(__bcma_driver_register); 423 424 void bcma_driver_unregister(struct bcma_driver *drv) 425 { 426 driver_unregister(&drv->drv); 427 } 428 EXPORT_SYMBOL_GPL(bcma_driver_unregister); 429 430 static int bcma_bus_match(struct device *dev, struct device_driver *drv) 431 { 432 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 433 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 434 const struct bcma_device_id *cid = &core->id; 435 const struct bcma_device_id *did; 436 437 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) { 438 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) && 439 (did->id == cid->id || did->id == BCMA_ANY_ID) && 440 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) && 441 (did->class == cid->class || did->class == BCMA_ANY_CLASS)) 442 return 1; 443 } 444 return 0; 445 } 446 447 static int bcma_device_probe(struct device *dev) 448 { 449 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 450 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 451 drv); 452 int err = 0; 453 454 if (adrv->probe) 455 err = adrv->probe(core); 456 457 return err; 458 } 459 460 static int bcma_device_remove(struct device *dev) 461 { 462 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 463 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 464 drv); 465 466 if (adrv->remove) 467 adrv->remove(core); 468 469 return 0; 470 } 471 472 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env) 473 { 474 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 475 476 return add_uevent_var(env, 477 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X", 478 core->id.manuf, core->id.id, 479 core->id.rev, core->id.class); 480 } 481 482 static int __init bcma_modinit(void) 483 { 484 int err; 485 486 err = bus_register(&bcma_bus_type); 487 if (err) 488 return err; 489 490 #ifdef CONFIG_BCMA_HOST_PCI 491 err = bcma_host_pci_init(); 492 if (err) { 493 pr_err("PCI host initialization failed\n"); 494 err = 0; 495 } 496 #endif 497 498 return err; 499 } 500 fs_initcall(bcma_modinit); 501 502 static void __exit bcma_modexit(void) 503 { 504 #ifdef CONFIG_BCMA_HOST_PCI 505 bcma_host_pci_exit(); 506 #endif 507 bus_unregister(&bcma_bus_type); 508 } 509 module_exit(bcma_modexit) 510