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