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