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 155 156 return 0; 157 } 158 159 static void bcma_unregister_cores(struct bcma_bus *bus) 160 { 161 struct bcma_device *core, *tmp; 162 163 list_for_each_entry_safe(core, tmp, &bus->cores, list) { 164 list_del(&core->list); 165 if (core->dev_registered) 166 device_unregister(&core->dev); 167 } 168 } 169 170 int __devinit bcma_bus_register(struct bcma_bus *bus) 171 { 172 int err; 173 struct bcma_device *core; 174 175 mutex_lock(&bcma_buses_mutex); 176 bus->num = bcma_bus_next_num++; 177 mutex_unlock(&bcma_buses_mutex); 178 179 /* Scan for devices (cores) */ 180 err = bcma_bus_scan(bus); 181 if (err) { 182 bcma_err(bus, "Failed to scan: %d\n", err); 183 return -1; 184 } 185 186 /* Init CC core */ 187 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 188 if (core) { 189 bus->drv_cc.core = core; 190 bcma_core_chipcommon_init(&bus->drv_cc); 191 } 192 193 /* Init MIPS core */ 194 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 195 if (core) { 196 bus->drv_mips.core = core; 197 bcma_core_mips_init(&bus->drv_mips); 198 } 199 200 /* Init PCIE core */ 201 core = bcma_find_core(bus, BCMA_CORE_PCIE); 202 if (core) { 203 bus->drv_pci.core = core; 204 bcma_core_pci_init(&bus->drv_pci); 205 } 206 207 /* Init GBIT MAC COMMON core */ 208 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 209 if (core) { 210 bus->drv_gmac_cmn.core = core; 211 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn); 212 } 213 214 /* Try to get SPROM */ 215 err = bcma_sprom_get(bus); 216 if (err == -ENOENT) { 217 bcma_err(bus, "No SPROM available\n"); 218 } else if (err) 219 bcma_err(bus, "Failed to get SPROM: %d\n", err); 220 221 /* Register found cores */ 222 bcma_register_cores(bus); 223 224 bcma_info(bus, "Bus registered\n"); 225 226 return 0; 227 } 228 229 void bcma_bus_unregister(struct bcma_bus *bus) 230 { 231 struct bcma_device *cores[3]; 232 233 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 234 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE); 235 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 236 237 bcma_unregister_cores(bus); 238 239 kfree(cores[2]); 240 kfree(cores[1]); 241 kfree(cores[0]); 242 } 243 244 int __init bcma_bus_early_register(struct bcma_bus *bus, 245 struct bcma_device *core_cc, 246 struct bcma_device *core_mips) 247 { 248 int err; 249 struct bcma_device *core; 250 struct bcma_device_id match; 251 252 bcma_init_bus(bus); 253 254 match.manuf = BCMA_MANUF_BCM; 255 match.id = bcma_cc_core_id(bus); 256 match.class = BCMA_CL_SIM; 257 match.rev = BCMA_ANY_REV; 258 259 /* Scan for chip common core */ 260 err = bcma_bus_scan_early(bus, &match, core_cc); 261 if (err) { 262 bcma_err(bus, "Failed to scan for common core: %d\n", err); 263 return -1; 264 } 265 266 match.manuf = BCMA_MANUF_MIPS; 267 match.id = BCMA_CORE_MIPS_74K; 268 match.class = BCMA_CL_SIM; 269 match.rev = BCMA_ANY_REV; 270 271 /* Scan for mips core */ 272 err = bcma_bus_scan_early(bus, &match, core_mips); 273 if (err) { 274 bcma_err(bus, "Failed to scan for mips core: %d\n", err); 275 return -1; 276 } 277 278 /* Init CC core */ 279 core = bcma_find_core(bus, bcma_cc_core_id(bus)); 280 if (core) { 281 bus->drv_cc.core = core; 282 bcma_core_chipcommon_init(&bus->drv_cc); 283 } 284 285 /* Init MIPS core */ 286 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K); 287 if (core) { 288 bus->drv_mips.core = core; 289 bcma_core_mips_init(&bus->drv_mips); 290 } 291 292 bcma_info(bus, "Early bus registered\n"); 293 294 return 0; 295 } 296 297 #ifdef CONFIG_PM 298 int bcma_bus_suspend(struct bcma_bus *bus) 299 { 300 struct bcma_device *core; 301 302 list_for_each_entry(core, &bus->cores, list) { 303 struct device_driver *drv = core->dev.driver; 304 if (drv) { 305 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 306 if (adrv->suspend) 307 adrv->suspend(core); 308 } 309 } 310 return 0; 311 } 312 313 int bcma_bus_resume(struct bcma_bus *bus) 314 { 315 struct bcma_device *core; 316 317 /* Init CC core */ 318 if (bus->drv_cc.core) { 319 bus->drv_cc.setup_done = false; 320 bcma_core_chipcommon_init(&bus->drv_cc); 321 } 322 323 list_for_each_entry(core, &bus->cores, list) { 324 struct device_driver *drv = core->dev.driver; 325 if (drv) { 326 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 327 if (adrv->resume) 328 adrv->resume(core); 329 } 330 } 331 332 return 0; 333 } 334 #endif 335 336 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner) 337 { 338 drv->drv.name = drv->name; 339 drv->drv.bus = &bcma_bus_type; 340 drv->drv.owner = owner; 341 342 return driver_register(&drv->drv); 343 } 344 EXPORT_SYMBOL_GPL(__bcma_driver_register); 345 346 void bcma_driver_unregister(struct bcma_driver *drv) 347 { 348 driver_unregister(&drv->drv); 349 } 350 EXPORT_SYMBOL_GPL(bcma_driver_unregister); 351 352 static int bcma_bus_match(struct device *dev, struct device_driver *drv) 353 { 354 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 355 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv); 356 const struct bcma_device_id *cid = &core->id; 357 const struct bcma_device_id *did; 358 359 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) { 360 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) && 361 (did->id == cid->id || did->id == BCMA_ANY_ID) && 362 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) && 363 (did->class == cid->class || did->class == BCMA_ANY_CLASS)) 364 return 1; 365 } 366 return 0; 367 } 368 369 static int bcma_device_probe(struct device *dev) 370 { 371 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 372 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 373 drv); 374 int err = 0; 375 376 if (adrv->probe) 377 err = adrv->probe(core); 378 379 return err; 380 } 381 382 static int bcma_device_remove(struct device *dev) 383 { 384 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 385 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver, 386 drv); 387 388 if (adrv->remove) 389 adrv->remove(core); 390 391 return 0; 392 } 393 394 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env) 395 { 396 struct bcma_device *core = container_of(dev, struct bcma_device, dev); 397 398 return add_uevent_var(env, 399 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X", 400 core->id.manuf, core->id.id, 401 core->id.rev, core->id.class); 402 } 403 404 static int __init bcma_modinit(void) 405 { 406 int err; 407 408 err = bus_register(&bcma_bus_type); 409 if (err) 410 return err; 411 412 #ifdef CONFIG_BCMA_HOST_PCI 413 err = bcma_host_pci_init(); 414 if (err) { 415 pr_err("PCI host initialization failed\n"); 416 err = 0; 417 } 418 #endif 419 420 return err; 421 } 422 fs_initcall(bcma_modinit); 423 424 static void __exit bcma_modexit(void) 425 { 426 #ifdef CONFIG_BCMA_HOST_PCI 427 bcma_host_pci_exit(); 428 #endif 429 bus_unregister(&bcma_bus_type); 430 } 431 module_exit(bcma_modexit) 432