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 void bcma_release_core_dev(struct device *dev) 85 { 86 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 87 if (core->io_addr) 88 iounmap(core->io_addr); 89 if (core->io_wrap) 90 iounmap(core->io_wrap); 91 kfree(core); 92 } 93 94 static int bcma_register_cores(struct bcma_bus *bus) 95 { 96 struct bcma_device *core; 97 int err, dev_id = 0; 98 99 list_for_each_entry(core, &bus->cores, list) { 100 /* We support that cores ourself */ 101 switch (core->id.id) { 102 case BCMA_CORE_4706_CHIPCOMMON: 103 case BCMA_CORE_CHIPCOMMON: 104 case BCMA_CORE_PCI: 105 case BCMA_CORE_PCIE: 106 case BCMA_CORE_MIPS_74K: 107 case BCMA_CORE_4706_MAC_GBIT_COMMON: 108 continue; 109 } 110 111 core->dev.release = bcma_release_core_dev; 112 core->dev.bus = &bcma_bus_type; 113 dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id); 114 115 switch (bus->hosttype) { 116 case BCMA_HOSTTYPE_PCI: 117 core->dev.parent = &bus->host_pci->dev; 118 core->dma_dev = &bus->host_pci->dev; 119 core->irq = bus->host_pci->irq; 120 break; 121 case BCMA_HOSTTYPE_SOC: 122 core->dev.dma_mask = &core->dev.coherent_dma_mask; 123 core->dma_dev = &core->dev; 124 break; 125 case BCMA_HOSTTYPE_SDIO: 126 break; 127 } 128 129 err = device_register(&core->dev); 130 if (err) { 131 bcma_err(bus, 132 "Could not register dev for core 0x%03X\n", 133 core->id.id); 134 continue; 135 } 136 core->dev_registered = true; 137 dev_id++; 138 } 139 140 #ifdef CONFIG_BCMA_SFLASH 141 if (bus->drv_cc.sflash.present) { 142 err = platform_device_register(&bcma_sflash_dev); 143 if (err) 144 bcma_err(bus, "Error registering serial flash\n"); 145 } 146 #endif 147 148 #ifdef CONFIG_BCMA_NFLASH 149 if (bus->drv_cc.nflash.present) { 150 err = platform_device_register(&bcma_nflash_dev); 151 if (err) 152 bcma_err(bus, "Error registering NAND flash\n"); 153 } 154 #endif 155 err = bcma_gpio_init(&bus->drv_cc); 156 if (err == -ENOTSUPP) 157 bcma_debug(bus, "GPIO driver not activated\n"); 158 else if (err) 159 bcma_err(bus, "Error registering GPIO driver: %i\n", err); 160 161 return 0; 162 } 163 164 static void bcma_unregister_cores(struct bcma_bus *bus) 165 { 166 struct bcma_device *core, *tmp; 167 168 list_for_each_entry_safe(core, tmp, &bus->cores, list) { 169 list_del(&core->list); 170 if (core->dev_registered) 171 device_unregister(&core->dev); 172 } 173 } 174 175 int __devinit bcma_bus_register(struct bcma_bus *bus) 176 { 177 int err; 178 struct bcma_device *core; 179 180 mutex_lock(&bcma_buses_mutex); 181 bus->num = bcma_bus_next_num++; 182 mutex_unlock(&bcma_buses_mutex); 183 184 /* Scan for devices (cores) */ 185 err = bcma_bus_scan(bus); 186 if (err) { 187 bcma_err(bus, "Failed to scan: %d\n", err); 188 return -1; 189 } 190 191 /* Init CC core */ 192 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 193 if (core) { 194 bus->drv_cc.core = core; 195 bcma_core_chipcommon_init(&bus->drv_cc); 196 } 197 198 /* Init MIPS core */ 199 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 200 if (core) { 201 bus->drv_mips.core = core; 202 bcma_core_mips_init(&bus->drv_mips); 203 } 204 205 /* Init PCIE core */ 206 core = bcma_find_core(bus, BCMA_CORE_PCIE); 207 if (core) { 208 bus->drv_pci.core = core; 209 bcma_core_pci_init(&bus->drv_pci); 210 } 211 212 /* Init GBIT MAC COMMON core */ 213 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 214 if (core) { 215 bus->drv_gmac_cmn.core = core; 216 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn); 217 } 218 219 /* Try to get SPROM */ 220 err = bcma_sprom_get(bus); 221 if (err == -ENOENT) { 222 bcma_err(bus, "No SPROM available\n"); 223 } else if (err) 224 bcma_err(bus, "Failed to get SPROM: %d\n", err); 225 226 /* Register found cores */ 227 bcma_register_cores(bus); 228 229 bcma_info(bus, "Bus registered\n"); 230 231 return 0; 232 } 233 234 void bcma_bus_unregister(struct bcma_bus *bus) 235 { 236 struct bcma_device *cores[3]; 237 238 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 239 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE); 240 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 241 242 bcma_unregister_cores(bus); 243 244 kfree(cores[2]); 245 kfree(cores[1]); 246 kfree(cores[0]); 247 } 248 249 int __init bcma_bus_early_register(struct bcma_bus *bus, 250 struct bcma_device *core_cc, 251 struct bcma_device *core_mips) 252 { 253 int err; 254 struct bcma_device *core; 255 struct bcma_device_id match; 256 257 bcma_init_bus(bus); 258 259 match.manuf = BCMA_MANUF_BCM; 260 match.id = bcma_cc_core_id(bus); 261 match.class = BCMA_CL_SIM; 262 match.rev = BCMA_ANY_REV; 263 264 /* Scan for chip common core */ 265 err = bcma_bus_scan_early(bus, &match, core_cc); 266 if (err) { 267 bcma_err(bus, "Failed to scan for common core: %d\n", err); 268 return -1; 269 } 270 271 match.manuf = BCMA_MANUF_MIPS; 272 match.id = BCMA_CORE_MIPS_74K; 273 match.class = BCMA_CL_SIM; 274 match.rev = BCMA_ANY_REV; 275 276 /* Scan for mips core */ 277 err = bcma_bus_scan_early(bus, &match, core_mips); 278 if (err) { 279 bcma_err(bus, "Failed to scan for mips core: %d\n", err); 280 return -1; 281 } 282 283 /* Init CC core */ 284 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 285 if (core) { 286 bus->drv_cc.core = core; 287 bcma_core_chipcommon_init(&bus->drv_cc); 288 } 289 290 /* Init MIPS core */ 291 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 292 if (core) { 293 bus->drv_mips.core = core; 294 bcma_core_mips_init(&bus->drv_mips); 295 } 296 297 bcma_info(bus, "Early bus registered\n"); 298 299 return 0; 300 } 301 302 #ifdef CONFIG_PM 303 int bcma_bus_suspend(struct bcma_bus *bus) 304 { 305 struct bcma_device *core; 306 307 list_for_each_entry(core, &bus->cores, list) { 308 struct device_driver *drv = core->dev.driver; 309 if (drv) { 310 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 311 if (adrv->suspend) 312 adrv->suspend(core); 313 } 314 } 315 return 0; 316 } 317 318 int bcma_bus_resume(struct bcma_bus *bus) 319 { 320 struct bcma_device *core; 321 322 /* Init CC core */ 323 if (bus->drv_cc.core) { 324 bus->drv_cc.setup_done = false; 325 bcma_core_chipcommon_init(&bus->drv_cc); 326 } 327 328 list_for_each_entry(core, &bus->cores, list) { 329 struct device_driver *drv = core->dev.driver; 330 if (drv) { 331 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 332 if (adrv->resume) 333 adrv->resume(core); 334 } 335 } 336 337 return 0; 338 } 339 #endif 340 341 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner) 342 { 343 drv->drv.name = drv->name; 344 drv->drv.bus = &bcma_bus_type; 345 drv->drv.owner = owner; 346 347 return driver_register(&drv->drv); 348 } 349 EXPORT_SYMBOL_GPL(__bcma_driver_register); 350 351 void bcma_driver_unregister(struct bcma_driver *drv) 352 { 353 driver_unregister(&drv->drv); 354 } 355 EXPORT_SYMBOL_GPL(bcma_driver_unregister); 356 357 static int bcma_bus_match(struct device *dev, struct device_driver *drv) 358 { 359 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 360 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 361 const struct bcma_device_id *cid = &core->id; 362 const struct bcma_device_id *did; 363 364 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) { 365 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) && 366 (did->id == cid->id || did->id == BCMA_ANY_ID) && 367 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) && 368 (did->class == cid->class || did->class == BCMA_ANY_CLASS)) 369 return 1; 370 } 371 return 0; 372 } 373 374 static int bcma_device_probe(struct device *dev) 375 { 376 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 377 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 378 drv); 379 int err = 0; 380 381 if (adrv->probe) 382 err = adrv->probe(core); 383 384 return err; 385 } 386 387 static int bcma_device_remove(struct device *dev) 388 { 389 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 390 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 391 drv); 392 393 if (adrv->remove) 394 adrv->remove(core); 395 396 return 0; 397 } 398 399 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env) 400 { 401 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 402 403 return add_uevent_var(env, 404 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X", 405 core->id.manuf, core->id.id, 406 core->id.rev, core->id.class); 407 } 408 409 static int __init bcma_modinit(void) 410 { 411 int err; 412 413 err = bus_register(&bcma_bus_type); 414 if (err) 415 return err; 416 417 #ifdef CONFIG_BCMA_HOST_PCI 418 err = bcma_host_pci_init(); 419 if (err) { 420 pr_err("PCI host initialization failed\n"); 421 err = 0; 422 } 423 #endif 424 425 return err; 426 } 427 fs_initcall(bcma_modinit); 428 429 static void __exit bcma_modexit(void) 430 { 431 #ifdef CONFIG_BCMA_HOST_PCI 432 bcma_host_pci_exit(); 433 #endif 434 bus_unregister(&bcma_bus_type); 435 } 436 module_exit(bcma_modexit) 437