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 167 168 if (bus->hosttype == BCMA_HOSTTYPE_SOC) { 169 err = bcma_chipco_watchdog_register(&bus->drv_cc); 170 if (err) 171 bcma_err(bus, "Error registering watchdog driver\n"); 172 } 173 174 return 0; 175 } 176 177 static void bcma_unregister_cores(struct bcma_bus *bus) 178 { 179 struct bcma_device *core, *tmp; 180 181 list_for_each_entry_safe(core, tmp, &bus->cores, list) { 182 list_del(&core->list); 183 if (core->dev_registered) 184 device_unregister(&core->dev); 185 } 186 if (bus->hosttype == BCMA_HOSTTYPE_SOC) 187 platform_device_unregister(bus->drv_cc.watchdog); 188 } 189 190 int __devinit bcma_bus_register(struct bcma_bus *bus) 191 { 192 int err; 193 struct bcma_device *core; 194 195 mutex_lock(&bcma_buses_mutex); 196 bus->num = bcma_bus_next_num++; 197 mutex_unlock(&bcma_buses_mutex); 198 199 /* Scan for devices (cores) */ 200 err = bcma_bus_scan(bus); 201 if (err) { 202 bcma_err(bus, "Failed to scan: %d\n", err); 203 return -1; 204 } 205 206 /* Early init CC core */ 207 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 208 if (core) { 209 bus->drv_cc.core = core; 210 bcma_core_chipcommon_early_init(&bus->drv_cc); 211 } 212 213 /* Try to get SPROM */ 214 err = bcma_sprom_get(bus); 215 if (err == -ENOENT) { 216 bcma_err(bus, "No SPROM available\n"); 217 } else if (err) 218 bcma_err(bus, "Failed to get SPROM: %d\n", err); 219 220 /* Init CC core */ 221 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 222 if (core) { 223 bus->drv_cc.core = core; 224 bcma_core_chipcommon_init(&bus->drv_cc); 225 } 226 227 /* Init MIPS core */ 228 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 229 if (core) { 230 bus->drv_mips.core = core; 231 bcma_core_mips_init(&bus->drv_mips); 232 } 233 234 /* Init PCIE core */ 235 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0); 236 if (core) { 237 bus->drv_pci[0].core = core; 238 bcma_core_pci_init(&bus->drv_pci[0]); 239 } 240 241 /* Init PCIE core */ 242 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1); 243 if (core) { 244 bus->drv_pci[1].core = core; 245 bcma_core_pci_init(&bus->drv_pci[1]); 246 } 247 248 /* Init GBIT MAC COMMON core */ 249 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 250 if (core) { 251 bus->drv_gmac_cmn.core = core; 252 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn); 253 } 254 255 /* Register found cores */ 256 bcma_register_cores(bus); 257 258 bcma_info(bus, "Bus registered\n"); 259 260 return 0; 261 } 262 263 void bcma_bus_unregister(struct bcma_bus *bus) 264 { 265 struct bcma_device *cores[3]; 266 267 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 268 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE); 269 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 270 271 bcma_unregister_cores(bus); 272 273 kfree(cores[2]); 274 kfree(cores[1]); 275 kfree(cores[0]); 276 } 277 278 int __init bcma_bus_early_register(struct bcma_bus *bus, 279 struct bcma_device *core_cc, 280 struct bcma_device *core_mips) 281 { 282 int err; 283 struct bcma_device *core; 284 struct bcma_device_id match; 285 286 bcma_init_bus(bus); 287 288 match.manuf = BCMA_MANUF_BCM; 289 match.id = bcma_cc_core_id(bus); 290 match.class = BCMA_CL_SIM; 291 match.rev = BCMA_ANY_REV; 292 293 /* Scan for chip common core */ 294 err = bcma_bus_scan_early(bus, &match, core_cc); 295 if (err) { 296 bcma_err(bus, "Failed to scan for common core: %d\n", err); 297 return -1; 298 } 299 300 match.manuf = BCMA_MANUF_MIPS; 301 match.id = BCMA_CORE_MIPS_74K; 302 match.class = BCMA_CL_SIM; 303 match.rev = BCMA_ANY_REV; 304 305 /* Scan for mips core */ 306 err = bcma_bus_scan_early(bus, &match, core_mips); 307 if (err) { 308 bcma_err(bus, "Failed to scan for mips core: %d\n", err); 309 return -1; 310 } 311 312 /* Early init CC core */ 313 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 314 if (core) { 315 bus->drv_cc.core = core; 316 bcma_core_chipcommon_early_init(&bus->drv_cc); 317 } 318 319 /* Early init MIPS core */ 320 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 321 if (core) { 322 bus->drv_mips.core = core; 323 bcma_core_mips_early_init(&bus->drv_mips); 324 } 325 326 bcma_info(bus, "Early bus registered\n"); 327 328 return 0; 329 } 330 331 #ifdef CONFIG_PM 332 int bcma_bus_suspend(struct bcma_bus *bus) 333 { 334 struct bcma_device *core; 335 336 list_for_each_entry(core, &bus->cores, list) { 337 struct device_driver *drv = core->dev.driver; 338 if (drv) { 339 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 340 if (adrv->suspend) 341 adrv->suspend(core); 342 } 343 } 344 return 0; 345 } 346 347 int bcma_bus_resume(struct bcma_bus *bus) 348 { 349 struct bcma_device *core; 350 351 /* Init CC core */ 352 if (bus->drv_cc.core) { 353 bus->drv_cc.setup_done = false; 354 bcma_core_chipcommon_init(&bus->drv_cc); 355 } 356 357 list_for_each_entry(core, &bus->cores, list) { 358 struct device_driver *drv = core->dev.driver; 359 if (drv) { 360 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 361 if (adrv->resume) 362 adrv->resume(core); 363 } 364 } 365 366 return 0; 367 } 368 #endif 369 370 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner) 371 { 372 drv->drv.name = drv->name; 373 drv->drv.bus = &bcma_bus_type; 374 drv->drv.owner = owner; 375 376 return driver_register(&drv->drv); 377 } 378 EXPORT_SYMBOL_GPL(__bcma_driver_register); 379 380 void bcma_driver_unregister(struct bcma_driver *drv) 381 { 382 driver_unregister(&drv->drv); 383 } 384 EXPORT_SYMBOL_GPL(bcma_driver_unregister); 385 386 static int bcma_bus_match(struct device *dev, struct device_driver *drv) 387 { 388 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 389 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 390 const struct bcma_device_id *cid = &core->id; 391 const struct bcma_device_id *did; 392 393 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) { 394 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) && 395 (did->id == cid->id || did->id == BCMA_ANY_ID) && 396 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) && 397 (did->class == cid->class || did->class == BCMA_ANY_CLASS)) 398 return 1; 399 } 400 return 0; 401 } 402 403 static int bcma_device_probe(struct device *dev) 404 { 405 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 406 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 407 drv); 408 int err = 0; 409 410 if (adrv->probe) 411 err = adrv->probe(core); 412 413 return err; 414 } 415 416 static int bcma_device_remove(struct device *dev) 417 { 418 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 419 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 420 drv); 421 422 if (adrv->remove) 423 adrv->remove(core); 424 425 return 0; 426 } 427 428 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env) 429 { 430 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 431 432 return add_uevent_var(env, 433 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X", 434 core->id.manuf, core->id.id, 435 core->id.rev, core->id.class); 436 } 437 438 static int __init bcma_modinit(void) 439 { 440 int err; 441 442 err = bus_register(&bcma_bus_type); 443 if (err) 444 return err; 445 446 #ifdef CONFIG_BCMA_HOST_PCI 447 err = bcma_host_pci_init(); 448 if (err) { 449 pr_err("PCI host initialization failed\n"); 450 err = 0; 451 } 452 #endif 453 454 return err; 455 } 456 fs_initcall(bcma_modinit); 457 458 static void __exit bcma_modexit(void) 459 { 460 #ifdef CONFIG_BCMA_HOST_PCI 461 bcma_host_pci_exit(); 462 #endif 463 bus_unregister(&bcma_bus_type); 464 } 465 module_exit(bcma_modexit) 466